---
name: "Arma 3: Startup Parameters"
type: topic
aliases: ["Arma 3 Startup Parameters", "Arma3: Startup Parameters"]
source: https://community.bistudio.com/wiki/Arma_3:_Startup_Parameters
revid: 378577
updated: 2026-05-10T16:57:41Z
---

# Arma 3: Startup Parameters

Startup parameters are command line interface(CLI) arguments that go after the executable's name in order to set options; e.g `arma3_x64.exe -window` to start the game in [windowed](../topics/Startup_Parameters.md#window) mode.

> [!NOTE]
> - Startup parameters' *names* are case-insensitive - e.g `-WINDOW` and `-window` are identical.
> - Spaces in parameter values must be wrapped in quotations. e.g. `"-profiles=E:\Arma 3\Profiles"` or `-profiles="E:\Arma 3\Profiles"`
> - Most of the following parameters can be set with the [Arma 3: Launcher](../topics/Launcher.md).

### Steam

1. Choose the game in Steam\Library
1. Right click on the game
1. Select properties
1. Hit "Set launch options"

**Example:** `-nosplash "-mod=test;x\test;c:\arma 3\test2"`

### Windows

When working with shortcuts, cmd launch options: there is max characters limit for the executing line, use **-par** (see: [Startup Parameters Config File](../topics/Startup_Parameters_Config_File.md)) to avoid it.

| Startup Command Line | parameters file |
|---|---|
| `arma3_x64.exe "-par=D:\Arma 3\Startup Parameters.txt"` | ```<br>-skipIntro<br>-noSplash<br>-enableHT<br>-hugePages<br>-noLogs<br>``` |

### Path Definition

There are a few basics to keep in mind when defining path as part of a parameter.

#### Spaces

The path **and** -profiles need to be enclosed with quotes if it contains spaces, e.g `"-profiles=E:\Arma 3\Profiles" or -profiles="E:\Arma 3\Profiles"`.

#### Relative vs Absolute

You can define most, if not all path in both ways.

**Relative:** `-profiles=Profiles`

**Absolute:** `"-profiles=E:\Arma 3\Profiles"`

The relative path is normally based on the game main folder, where the exe resides in. However when you use -profiles, some commands use this path defined there as base.

### Display Options

#### window

Displays Arma 3 windowed instead of full screen. Screen resolution / window size are set in [arma3.cfg](../topics/arma2.cfg.md).

**Example**

```
arma3_x64.exe -window
```

#### noWindowBorder (Arma 3 v2.22)

Removes the default window border in windowed mode.

**Example**

```
arma3_x64.exe -window -noWindowBorder
```

#### posX

Sets the default X Position of the Window.

**Example**

```
arma3_x64.exe -posX=50
```

#### posY

Sets the default Y Position of the Window.

**Example**

```
arma3_x64.exe -posY=50
```

#### adapter

Sets the default Video Adapter.

**Example**

```
arma3_x64.exe -adapter=MISSING_AN_EXAMPLE
```

### Game Loading Speedup

#### noSplash

Tells the engine to bypass the splash screens on startup of Arma 3.

> [!NOTE]
> Real speed-up gained with this is likely to be negligible in Arma 3, as the loading screens are handled in parallel with the game data being loaded, and the loading itself takes quite long thanks to the amount of data needed.

**Example**

```
arma3_x64.exe -noSplash
```

#### skipIntro

Disables world intros in the main menu permanently.

> [!NOTE]
> Real speed-up gained with this is likely to be negligible in Arma 3, as the loading screens are handled in parallel with the game data being loaded, and the loading itself takes quite long thanks to the amount of data needed.

**Example**

```
arma3_x64.exe -skipIntro
```

#### world

Select a world loaded by default. For faster game loading (no default world loaded and world intro in the main menu, *only at game start*, disabled): -world=empty.

**Example**

For faster game loading (no default world loaded and world intro in the main menu, *only at game start*, disabled)

```
arma3_x64.exe -world=empty
```

Load Altis

```
arma3_x64.exe -world=Altis
```

#### worldCfg

Inits a landscape by the given world config.

### Profile Options

#### name

Sets the profile name.

**Example**

```
arma3_x64.exe -name=PlayerOne
```

#### profiles

Location of user-profile folder.

If a custom path is set, default files and folders (logFiles, AnimDataCache, DataCache, SteamPreviewCache....) located by default in `%LocalAppData%/Arma 3` will be created in that new location.

However, old files will stay in the old location and will not be copied.

**Example 1**

```
arma3_x64.exe -profiles=C:\arma3\Profiles
```

**Example 2**

```
arma3_x64.exe -profiles=Profiles
```

Example 2 create a folder called *Profiles* in the Arma 3 root directory

> [!IMPORTANT]
> The Windows user account needs write access in the chosen location.

#### unit

Parameter passes a unit's ID number to the binary, translates to *https://units.arma3.com/my-units#?unit=<number>*

**Example**

```
arma3_x64.exe -unit=1337
```

### Misc.

#### buldozer

Starts [Buldozer](../topics/Buldozer.md) mode.

**Example**

```
arma3_x64.exe -buldozer
```

#### noLand

Starts with no world loaded. (Used for [Buldozer](../topics/Buldozer.md))

**Example**

```
arma3_x64.exe -noLand
```

#### noSound

Disables sound output.

**Example**

```
arma3_x64.exe -noSound
```

#### doNothing

Engine closes immediately after detecting this option.

**Example**

```
arma3_x64.exe -doNothing
```

#### mod

Loads the specified [mod folders](../topics/Arma~3A_Mod_Folders.md). Multiple folder need to be separated by a semicolon.

**Example 1**

```
arma3_x64.exe -mod=test;x\test;c:\arma3\test2
```

- **"test"** is located in the Arma 3 installation folder ("Arma 3\test") (relative path)
- **"x\test"** is in the installation folder ("Arma 3\x\test") (relative path; subfolder)
- **"c:\arma3\test2"** is in "c:\arma3\test2" (absolute path)

**Example 2**

On Windows

```
arma3_x64.exe "-mod=test;x\test;c:\arma3\test2"
```

**Example 3**

On Linux. Note the additional backslash in front of the semicolon

```
arma3_x64.exe "-mod=test\;x\test\;c:\arma3\test2"
```

> [!NOTE]
> "Relative path" starts from, or is rooted at, the directory from where the Arma 3 executable has been started and is not always the same where the executable is, like in betas.
>
> Usually this is the same as the installation path and the same as what is written in Windows registry, but if you copy or symlink the necessary file and folders, you may have different roots.
>
> It is useful when having multiple dedicated servers.

#### mpmissions (Arma 3 v2.22)

Sets alternative MPMissions directory for the server. The directory must be relative to 'Arma3' directory

> [!NOTE]
> Use **#mpmissions** command from BattlEye RCon to list available missions on the server. The RCon **missions** command does not work with custom -mpmissions=

**Example 1**

```
arma3_x64.exe -server -mpmissions=MyMPMissionsGoHere
```

**Example 2**

```
arma3_x64.exe -server -mpmissions=MPMissions\Experimental
```

**Example 3**

```
arma3server_x64.exe -mpmissions=MPMissions2
```

### Client Network Options

#### connect

Server IP to connect to.

**Example**

```
arma3_x64.exe -connect=168.152.15.147
```

#### port

Server port to connect to.

**Example**

```
arma3_x64.exe -port=1337
```

#### password

Server password to connect to.

**Example**

```
arma3_x64.exe -password=1337abc
```

#### host

Start a non-dedicated multiplayer host.

**Example**

```
arma3_x64.exe -host
```

### Server Options

#### setUpHost

Start the game in the setup server display. Works with the client exe. See reference image

**Example**

```
arma3_x64.exe -setUpHost
```

#### server

Start a [dedicated server](../topics/Dedicated_Server.md). Not needed for the dedicated server exe.

**Example**

```
arma3_x64.exe -server
```

#### port

Port to have dedicated server listen on.

**Example**

```
arma3server_x64.exe -port=1337
```

#### pid

File to write the server's PID (process ID) to.

- The file is removed automatically when the exe is stopped
- Only works for dedicated servers

**Example**

```
arma3server_x64.exe "-pid=C:\My Server\PID.txt"
```

#### ranking

Allowing you to output ranking information or otherwise know as player stats to a file.

The windows user account would need permissions to write to the folder of choice.

Output sample:

```cpp
class Player1
{
    name = "PlayerName";
    killsInfantry = 71;
    killsSoft = 3;
    killsArmor = 5;
    killsAir = 5;
    killsPlayers = 0;
    customScore = 0;
    killsTotal = 84;
    killed = 3;
};
```

**Example**

```
arma3server_x64.exe "-ranking=C:\arma3\ranking.log"
```

#### netlog

Enables multiplayer network traffic logging. For more details see server configuration.

**Example**

```
arma3server_x64.exe -netlog
```

#### cfg

Selects the [Server Basic Config file](../topics/Basic_Server_Config_File.md). Config file for server specific settings like network performance tuning.

> [!IMPORTANT]
> Using this parameter overrides the game config (`Documents\Arma 3\Arma3.cfg`); use at your own risk on clients.

**Example**

```
arma3server_x64.exe "-config=C:\My Server\basic.cfg"
```

#### config

Selects the [Server Config File](../topics/Server_Config_File.md). Config file for server specific settings like admin password and mission selection.

**Example**

```
arma3server_x64.exe "-config=C:\My Server\config.cfg"
```

#### profiles

Path to the folder containing server profile.

- By default, server logs are written to server profile folder
- If folder doesn't exist, it will be automatically created
- Does not work on Linux, no profile will be created or used - instead, remove this parameter and the profile will be created in `~/.local/share/Arma 3 - Other Profiles`

**Example**

```
arma3server_x64.exe "-profiles=C:\My Server\profiles"
```

#### bePath

By default BattlEye will create *BattlEye* folder inside server profile folder. With -bePath param it is possible to specify a custom folder.

**Example**

```
arma3_x64.exe -bePath=C:\MyBattlEyeFolder
```

#### ip

Command to enable support for Multihome servers. Allows server process to use defined available IP address. (b1.57.76934)

**Example**

```
arma3_x64.exe -ip=145.412.123.12
```

#### par

Command to read startup parameters from a file. For more details see [Startup parameters config file](../topics/Startup_Parameters_Config_File.md).

**Example**

```
arma3_x64.exe "-par=C:\Users\Player\Games\Arma 3\Arma 3 Parameter Files\par_common.txt"
```

#### client

Launch as client (console). Useful for [headless clients](../topics/Headless_Client.md).

**Example**

```
arma3_x64.exe -client
```

#### loadMissionToMemory

Server will load mission into memory on first client downloading it. Then it keeps it pre-processed pre-cached in memory for next clients, saving some server CPU cycles.

**Example**

```
arma3server_x64.exe -loadMissionToMemory
```

#### autoInit

Automatically initialize mission just like the first client does.

The server config file (server.cfg) must contain `Persistent = 1;` otherwise the `autoInit` parameter is skipped.

> [!IMPORTANT]
> This will break the [Arma 3: Mission Parameters](../topics/Mission_Parameters.md) function, so do not use it when you work with mission parameters, only default values are returned!

**Example**

```
arma3server_x64.exe -autoInit
```

#### serverMod

Loads the specified sub-folders for different server-side (not broadcasted to clients) mods.

- Separated by semi-colons
- Absolute path and multiple stacked folders are possible
- In Linux multiple folders arguments need the following separation syntax: -serverMod=mod1\\;mod2\\;mod3

**Example**

```
arma3server_x64.exe "-serverMod=myAwesomeMod;anotherAwesomeMod"
```

#### keysFolder (Arma 3 v2.22)

Adds folders out of which .bikey files are loaded.

- Separated by semi-colons
- Absolute path and multiple stacked folders are possible
- In Linux multiple folders arguments need the following separation syntax: -keysFolder=@modfolder\keys\\;@othermodfolder\keys

**Example**

```
arma3server_x64.exe "-keysFolder=@modfolder/keys;@othermodfolder/keys;"
```

Note that by default, the base game "keys" folder is included, but it can be excluded by having !keys in the list

```
-keysFolder=!keys;@modfolder/keys;@othermodfolder/keys;
```

#### disableServerThread

Option to disable the server send messaging thread in case of random crashing (may also decrease performance of server on multicore CPUs)

**Example**

```
arma3_x64.exe -disableServerThread
```

#### bandwidthAlg

Set to 2 to use a new experimental networking algorithm that might be better than the default one.

**Example**

```
arma3_x64.exe -bandwidthAlg=2
```

### Performance

#### limitFPS (Arma 3 v2.00)

Adjusts the FPS limit for the dedicated server/headless client to the specified value. The current default is 50. The available range goes from 5 to 1000.

> [!NOTE]
> The limit does not do anything when it is not reached.
>
> Higher FPS for a DS/HC network messages sent out more frequently, entities (units/vehicles/projectiles/etc) are simulated more often, as well as AI behavior and vision calculations are done more often.
>
> The practical impact of a higher fps limit for the DS/HC may or may not noticeable.

Since Arma 3 v2.20:

- servers with no players now limit their FPS to 30 (regardless of the `-limitFPS` parameter setting)
- this setting also works on clients.

> [!NOTE]
> Aside from more frequent simulation of the different engine parts, for a client more frequent rendering may lead to more fluent graphics/a more smooth visual experience and potentially more precise audio.\
> The FPS gets automatically limited in the main menu with `-world=empty` or when windowed mode is unfocused ("tabbed out").

#### maxMem

Overrides memory allocation limit to a certain amount (in megabytes).

> [!IMPORTANT]
> Until Arma 3 v2.14 there was a bug on the Linux server binary where it parses the maxMem value as a signed integer, therefore making 4096 interpreted as a negative value;
> in order to avoid this issue, use values like `2047`, `4095`, `8191`, `16383`, `32767` (2048 -1, 4096 -1 etc).

1024 MiB is a hard-coded minimum (anything lower falls back to 1024). The maximum is influenced by your operating system (any value over the maximum will be reverted to this value):

- 32-bit Windows + 32-bit game: 2047
- 64-bit Windows + 32-bit game: 3071
- 64-bit Windows + 64-bit game: (physical memory * 4) / 5

**Without the -maxMem parameter the engine attempts to set this parameter internaly to a reasonable value often defaulting to max values as described above.** The file cache is always excluded from the virtual address limit, see our developers blog: https://www.bistudio.com/blog/breaking-the-32-bit-barrier.

> [!NOTE]
> Note that setting maxMem to 2000 does not mean that the game will never allocate more then 2000 MiB. It says that the game will do everything in its power to not cross this limit. In general, it makes sense not using this parameter at all and only resort to it in case you experience issues with memory.

**Example**

```
arma3_x64.exe -maxMem=4096
```

#### maxVRAM

Defines video memory allocation limit to number (in megabytes).

- Minimum value is 128 MiB (anything lower falls back to 128)
- The value is ignored (under DX11) if engine properly detected VRAM size, minus 20% reserve with ceiling limit 300MB max
- Use to resolve e.g. Windows problem: http://support.microsoft.com/kb/2026022/en-us?p=1

**Example**

```
arma3_x64.exe -maxVRAM=4096
```

#### maxFileCacheSize

Arma 3 v2.14 Sets the default filecache size (when files are loaded from disk, they are cached in RAM. If the cache is full, the oldest file is thrown out).

> [!NOTE]
> - Default size was either `maxMemory - 448 MB` or if you had more than 2 GB of memory available to Arma 3, it would be limited to max 2048 MB.
> - Setting lower than 1 GB is not recommended.
> - Minimum possible value is 512 MB

**Example**

```
arma3_x64.exe -maxFileCacheSize=2048
```

#### noCB

Turns off multicore use. It slows down rendering but may resolve visual glitches.

**Example**

```
arma3_x64.exe -noCB
```

#### cpuCount

Change to a number less or equal than numbers of available cores. This will override auto detection (which equate to native cores).

The best way to simulate dual core on quad core is to use -cpuCount=2 when you run the game and then change the affinity to 2 cores to make sure additional cores can never be used when some over-scheduling happens.
It might also be possible to set the affinity in the OS before the process is launched.

> [!NOTE]
> **Since Arma 3 v2.20:** The minimum value is 2.

**Example**

```
arma3_x64.exe -cpuCount=8
```

#### cpuAffinity (Arma 3 v2.22)

Set the game's CPU affinity mask ([Microsoft documentation](https://learn.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-setprocessaffinitymask)).

> [!NOTE]
> You can use the [affinity calculator](https://bitsum.com/tools/cpu-affinity-calculator/) to calculate the correct mask value.
>
> To see if the value was applied correctly, check the [rpt file](../topics/Crash_Files.md).

**Example**

```
arma3_x64.exe -cpuAffinity=0xFF
```

#### cpuMainThreadAffinity (Arma 3 v2.22)

Set the main thread's CPU affinity mask ([Microsoft documentation](https://learn.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-setprocessaffinitymask)).

> [!NOTE]
> If the value could **not** be applied a message will be logged to the [rpt file](../topics/Crash_Files.md).

**Example**

```
arma3_x64.exe -cpuMainThreadAffinity=0x01
```

#### enableHT

Enables the use of all logical CPU cores for parallel tasks processing. If the CPU does not support Hyper-Threading or similar technology, this parameter is ignored.
When disabled, only physical cores are used.

> [!NOTE]
> Note that enabling this parameter may slightly improve or harm the performance depending on a scenario.
> This parameter is overridden if `-cpuCount` or `-cpuAffinity` are used so if you want to use the maximum number of CPU cores use "-enableHT" without "-cpuCount".

**Example**

```
arma3_x64.exe -enableHT
```

#### exThreads

Change to a number 0,1,3,5,7. This will override auto detection (which use 3 for dualcore and 7 for quadcore).

All file operations go through a dedicated thread. This offloads some processing from the main thread, however it adds some overhead at the same time.

The reason why threaded file ops were implemented was to serve as a basement for other threads ops. When multiple threads are running at the same time, OS is scheduling them on different cores.
Geometry and Texture loading (both done by the same thread) are scheduled on different cores outside the main rendering loop at the same time with the main rendering loop.

**Ex(tra)threads table**

| Parameter | Description |  |  |
|---|---|---|---|
| Number | Geometry loading | Texture loading | File operations |
| 0 | ✗ | ✗ | ✗ |
| 1 | ✗ | ✗ | ✓ |
| 3 | ✗ | ✓ | ✓ |
| 5 | ✓ | ✗ | ✓ |
| 7 | ✓ | ✓ | ✓ |

**Example**

```
arma3_x64.exe -exThreads=7
```

#### malloc

Sets the particular memory allocator to be used. Significantly affects both performance and stability of the game. [More details](../topics/Custom_Memory_Allocator.md).

**Example**

```
arma3_x64.exe -malloc=someMalloc
```

#### hugePages

Enables hugepages with the default memory allocator ([malloc](../topics/Custom_Memory_Allocator.md)) for both client and server.

**Example**

```
arma3_x64.exe -hugePages
```

#### setThreadCharacteristics (Arma 3 v2.10)

Registers the game's executable as "Game" in Windows for performance improvements.

> [!WARNING]
> This flag can freeze the whole Operating System if running Windows Server!

**Example**

```
arma3_x64.exe -setThreadCharacteristics
```

### Developer Options

#### noPause

Allow the game running even when its window does not have focus (i.e. running in the background)

**Example**

```
arma3_x64.exe -noPause
```

#### noPauseAudio (Arma 3 v2.10)

Keeps audio running in background while tabbed out. Should be used together with **-noPause** to work correctly

**Example**

```
arma3_x64.exe -noPauseAudio
```

#### showScriptErrors

Introduced to show errors in scripts on-screen. In Eden Editor, script errors are always shown, even when this parameter is not used.

**Example**

```
arma3_x64.exe -showScriptErrors
```

#### debug

Enables more verbose error logging. See [Arma 3: Debug Mode](../topics/Debug_Mode.md)

**Example**

```
arma3_x64.exe -debug
```

#### noFreezeCheck

Disables the freeze check. It creates otherwise max 4 dumps per game run in total - 2 per distinct freeze. Similar to [Crash Files](../topics/Crash_Files.md).

**Example**

```
arma3_x64.exe -noFreezeCheck
```

#### noLogs

Be aware this means none errors saved to RPT file (report log). Yet in case of crash the fault address block info is saved.

More details [here](http://forums.bistudio.com/showthread.php?159155-quot-nologs-quot-may-improve-performance-no-stuttering-read-details).

**Example**

```
arma3_x64.exe -noLogs
```

#### noFilePatching

Ensures that only PBOs are loaded and NO unpacked data.

> [!NOTE]
> Since Arma 3 v1.50 this was replaced in favor of the `-filePatching` parameter.

**Example**

```
arma3_x64.exe -noFilePatching
```

#### filePatching (Arma 3 v1.50)

Allows the game to load unpacked data. For more info see [CMA:DevelopmentSetup](../topics/CMA~3ADevelopmentSetup.md)

**Example**

```
arma3_x64.exe -filePatching
```

#### init

Run scripting command once in the main menu. For example to start a certain SP mission of choice automatically. See also [playMission](../commands/playMission.md). The Mission has to reside in the "arma3\Missions" folder, NOT the user directory.

**Example**

```
arma3_x64.exe -init=playMission["","Test.VR"]
```

#### <path>\mission.sqm

Load a mission directly in the editor. Example: `"C:\arma3\users\myUser\missions\myMission.intro\mission.sqm"`

#### autotest

Loads automatically a series of defined missions and on error writes to a log file.

The parameter can be used to automatically run a series of test missions. For example FPS measurement or scripting validation.

- The game runs in special mode. It runs all missions from the given list.
- If any mission fails (ends with other than END1), it is logged into the rpt file (search: <autotest).
- In case of any fail, the game also returns an errorlevel to DOS. This can be used to issue an notification by a secondary application.

**Launch Arma 3 with:** `"-autotest=c:\Arma 3\autotest\autotest.cfg"`

The `autotest.cfg` looks like:

```cpp
class TestMissions
{
    class TestCase01
    {
        campaign = "";
        mission = "autotest\TestCase01.VR"; // relative path to the arma directory
    };
    class TestCase02
    {
        campaign = "";
        mission = "C:\arma3\autotest\TestCase02.VR"; // absolute path
    };
};
```

> [!IMPORTANT]
> If `-profiles` is used, the relative path is relative to the specified profile path.

**Example**

```
arma3_x64.exe -autotest=c:\arma3\autotest\autotest.cfg
```

**RPT entry**

```html
<AutoTest result="FAILED">
    EndMode = LOSER
    Mission = autotest\TestCase01.VR
</AutoTest>
```

If possible use simple worlds, like VR, to keep the loading times short. The [loading screen](../commands/startLoadingScreen.md) command might be useful as well to speed up task that need no rendering.

#### beta

Loads the specified beta sub-folders. This allows use of beta build w/o disabling in-game mod/extension management (in UI menu).

- Separated by semicolons
- Absolute path and multiple stacked folders are possible
- **In Linux** multiple folders arguments need the following separation syntax: `arma3_x64.exe "-mod=betamod1\;betamod2\;betamod3"`

#### cfgDependenciesDebugPrint (Arma 3 v2.20)

Prints all addons in load order in the RPT.

Format is `'addonName' (config file path) - 'dependency1', 'dependency2', ...` or `'addonName','addonName2','addonName3' (...)` if multiple `CfgPatches` in same config.

#### checkSignatures

Provide a thorough test of all signatures of all loaded banks (PBOs) at the start of the game. Only the stored sha1 values are verified with signatures/keys. Output is in `.rpt` file.

**Example**

```
arma3_x64.exe -checkSignatures
```

#### checkSignaturesFull

Same as above, but checks every byte of the file content, and therefore not only verifies signatures, but also verifies file integrity.

**Example**

```
arma3_x64.exe -checkSignaturesFull
```

#### d3dNoLock

Doesn't lock the VRAM.

**Example**

```
arma3_x64.exe -d3dNoLock
```

#### d3dNoMultiCB

D3D uses Single Constant Buffers instead of Multiple Constant Buffers.

**Example**

```
arma3_x64.exe -d3dNoMultiCB
```

#### debugCallExtension

Logs extension calls in the rpt log like this:

**Example**

```
arma3_x64.exe -debugCallExtension
```

#### command

Creates [named pipe](https://en.wikipedia.org/wiki/Named_pipe) "\\\\.\pipe\name" for receiving predefined set of commands. See [Arma 3: Named Pipe](../topics/Named_Pipe.md).
Note that it works only on clients, but not on [dedicated server](../topics/Dedicated_Server.md).

**Example**

```
arma3_x64.exe -command=MyFancyPipeName
```

#### language (Arma 3 v2.04)

Starts client with preferred language. See [Stringtable.xml - Supported Languages](../topics/Stringtable.xml.md#supported-languages) for a list of supported languages. **Case-sensitive!** (className column)

> [!NOTE]
> Arma 3 v2.18 made the parameter work properly.

**Example**

```
arma3_x64.exe -language=German
```

#### preprocDefine (Arma 3 v2.06)

Defines a macro and optionally its value. Multiple macro can be defined by using this parameter multiple times.

**Example 1**

```
arma3_x64.exe -preprocDefine="CMD__MACRONAME=MACROVALUE"
arma3_x64.exe -preprocDefine=CMD__MACRONAME
arma3_x64.exe -preprocDefine=CMD__MACRO1 -preprocDefine=CMD__MACRO2
```

**Example 2**

arma3_x64.exe -preprocDefine=MACRO

The macro name **will** start with `CMD__`, the engine automatically adds the prefix if it is not present (`CMD__MACRO`).

#### dumpAddonDependencyGraph (Arma 3 v2.14)

dumps [Graphviz](https://en.wikipedia.org/wiki/Graphviz) text file into the RPT directory with a graph of all addon dependencies (`requiredAddons`)

**Example**

```
arma3_x64.exe -dumpAddonDependencyGraph
```

#### networkDiagInterval (Arma 3 v1.30 Arma 3 vPROF)

Polls the status of bandwidth, traffic and similar data every X seconds. Since Arma 3 v2.18 it also logs size and count of [public variables](../commands/publicVariable.md) when using the *Profiling binary*.

Tells you what type of packages are sent to which clients. Network types are obfuscated, so you can just make out who uses how much bandwidth.

**Example**

```
arma3_x64.exe -networkDiagInterval=5 // seconds between each diagnostics polling
```

> [!NOTE]
> Release statement by BI: Willing server admins may help us gather even more data to base future optimizations on. We'd like admins experiencing desync or other netcode issues to try and enable these diagnostics and send us the results on Feedback Tracker. The parameter is disabled by default because it may reduce performance when used.

File content example for the server:

```
===============================================================================================================================================
Server
-----------------------------------------------------------------------------------------------------------------------------------------------
Raw statistics 0
                                             player |     sent msg |   sent msg/s |       sent B |     sent B/s |      rec msg |    rec msg/s |        rec B |      rec B/s |       DS min |       DS max |       DS avg |       BW min |       BW max |       BW avg |
                                      __SERVER__(2) |            0 |         0.00 |            0 |         0.00 |            0 |       152.79 |            0 |     20819.12 |         0.00 |         0.00 |         0.00 | 2147483648.00 | 2147483648.00 | 2147483648.00 |
                                    test(538428231) |            0 |        21.51 |            0 |      9555.18 |            0 |         0.40 |            0 |        19.72 |         0.00 |         0.00 |         0.00 |    329417.00 |    343000.00 |    336140.00 |
                                              Total |            0 |        21.51 |            0 |      9555.18 |            0 |       153.19 |            0 |     20838.84 |         0.00 |         0.00 |         0.00 |
-----------------------------------------------------------------------------------------------------------------------------------------------
 Server - Sent
Type                                     |          msg |     msg/s |            B |          B/s | avg. B
Type_64                                  |          131 |     41.57 |         6876 |      2182.16 |   52.5
Type_468                                 |           13 |      4.13 |         4730 |      1501.11 |  363.8
Type_109                                 |           39 |     12.38 |         4412 |      1400.19 |  113.1
Type_10                                  |           81 |     25.71 |         4324 |      1372.26 |   53.4
Type_96                                  |           39 |     12.38 |         3947 |      1252.62 |  101.2
Type_126                                 |           31 |      9.84 |         2480 |       787.05 |   80.0
Type_53                                  |           26 |      8.25 |         2314 |       734.37 |   89.0
Type_385                                 |           10 |      3.17 |         2233 |       708.66 |  223.3
Type_114                                 |           40 |     12.69 |         2010 |       637.89 |   50.3
Type_98                                  |           35 |     11.11 |         1715 |       544.27 |   49.0
-----------------------------------------------------------------------------------------------------------------------------------------------
 Server - Received
Type                                     |          msg |     msg/s |            B |          B/s | avg. B
Type_18                                  |            3 |      0.20 |          156 |        10.76 |   52.0
Type_5                                   |            8 |      0.20 |           15 |         0.20 |    1.9
Type_468                                 |            0 |      0.00 |            0 |         0.00 |    0.0
Type_467                                 |            0 |      0.00 |            0 |         0.00 |    0.0
Type_466                                 |            0 |      0.00 |            0 |         0.00 |    0.0
Type_449                                 |            0 |      0.00 |            0 |         0.00 |    0.0
Type_427                                 |            0 |      0.00 |            0 |         0.00 |    0.0
Type_404                                 |            0 |      0.00 |            0 |         0.00 |    0.0
Type_385                                 |            0 |      0.00 |            0 |         0.00 |    0.0
Type_383                                 |            0 |      0.00 |            0 |         0.00 |    0.0
-----------------------------------------------------------------------------------------------------------------------------------------------
===============Vars total
        1804 - bis_fnc_storeparamsvalues_data
         554 - CBAs
         357 - paramsArray
          76 - cba_versioning_versions_serv
          76 - cba_versioning_versions_server
          70 - SPE_IFS_availableCalls
          48 - SPE_IFS_DS_ProviderBlackList
          36 - SPE_IFS_CAS_aimErrorSpread
          22 - SPE_IFS_SafetyDistance_CAS
          22 - SPE_IFS_SafetyDistance_HeavyArty
===============Vars recent
        1804 - bis_fnc_storeparamsvalues_data (1)
         554 - CBAs (9)
         357 - paramsArray (1)
          76 - cba_versioning_versions_serv (1)
          76 - cba_versioning_versions_server (1)
          70 - SPE_IFS_availableCalls (1)
          48 - SPE_IFS_DS_ProviderBlackList (1)
          36 - SPE_IFS_CAS_aimErrorSpread (1)
          22 - SPE_IFS_SafetyDistance_CAS (1)
          22 - SPE_IFS_SafetyDistance_HeavyArty (1)
```

File content example for a client:

```
===============================================================================================================================================
Client
-----------------------------------------------------------------------------------------------------------------------------------------------
Raw statistics 152.563
                                             player |     sent msg |   sent msg/s |       sent B |     sent B/s |      rec msg |    rec msg/s |        rec B |      rec B/s |       DS min |       DS max |       DS avg |       BW min |       BW max |       BW avg |
                                              Total |            0 |         0.00 |            0 |         0.00 |            0 |         3.78 |            0 |       506.77 |         0.00 |         0.00 |         0.00 |
-----------------------------------------------------------------------------------------------------------------------------------------------
 Client - Sent
Type                                     |          msg |     msg/s |            B |          B/s | avg. B
Type_133                                 |        25529 |    212.95 |      2056925 |     17417.13 |   80.6
Type_120                                 |        11046 |     87.65 |       328091 |      2616.33 |   29.7
Type_119                                 |         4058 |     20.32 |       265924 |      1335.86 |   65.5
Type_126                                 |          750 |     11.55 |        61633 |       958.96 |   82.2
Type_132                                 |          882 |      4.18 |       109926 |       523.11 |  124.6
Type_466                                 |         3671 |     29.08 |        58422 |       464.54 |   15.9
Type_467                                 |         1542 |     12.95 |        35189 |       296.02 |   22.8
Type_98                                  |         1571 |      4.58 |        81492 |       238.05 |   51.9
Type_114                                 |          806 |      2.59 |        45686 |       151.99 |   56.7
Type_166                                 |          190 |      1.59 |        12364 |       116.53 |   65.1
-----------------------------------------------------------------------------------------------------------------------------------------------
 Client - Received
Type                                     |          msg |     msg/s |            B |          B/s | avg. B
Type_381                                 |          247 |      1.00 |        17074 |        54.78 |   69.1
Type_383                                 |          244 |      1.00 |        14420 |        46.81 |   59.1
Type_126                                 |           17 |      0.40 |         1360 |        31.87 |   80.0
Type_133                                 |          104 |      0.20 |         7171 |        12.75 |   69.0
Type_98                                  |           37 |      0.20 |         1879 |        10.16 |   50.8
Type_120                                 |           15 |      0.20 |          435 |         5.78 |   29.0
Type_467                                 |           15 |      0.20 |          330 |         4.38 |   22.0
Type_333                                 |            9 |      0.20 |          153 |         3.39 |   17.0
Type_295                                 |            2 |      0.20 |           16 |         1.59 |    8.0
Type_92                                  |           49 |      0.20 |          363 |         1.39 |    7.4
-----------------------------------------------------------------------------------------------------------------------------------------------
===============Vars total
===============Vars recent
```

<sub>Source: [BI Community Wiki — Arma 3: Startup Parameters](https://community.bistudio.com/wiki/Arma_3:_Startup_Parameters) (revision 378577).</sub>
