CitizenMP IV Installation Guide & Troubleshooting

[Mark]

CitizenMP:IV is a multiplayer modification for the 2008 PC port of Grand Theft Auto IV, which differs from other multiplayer modifications in that it doesn't reimplement networking frameworks, but builds upon the powerful framework by the Rockstar Studios, as also used in Max Payne 3 and Grand Theft Auto V. This thread will be your reference both through the installation and troubleshooting phase.
CitizenMP IV Requirements

GTA IV 1.0.7.0 and above patches are supported, no more downgrading is required.
EFLC is also supported, you are free to choose which one to use.
Grand Theft Auto IV: The Complete Edition is also supported. (Latest is 1.2.0.32)

Download & Installation

You can download the client by clicking the "Download" button on CitizenMP:IV Reloaded Website.
 

• Extract the file zip you have just downloaded to any folder you like.
• Double click on "Launcher.exe" and wait, the launcher will now download the required files for it to work.
• Once the download is over, you'll have to specify the game's folder, usually the client detects it automatically.
• If the client asks you to update the game cache, do it.
• Once step 4 is done, you can enjoy your client as it launches.

Here is a video demonstration on how to install the client:


F.A.Q. and Troubleshooting

1) Is downgrading required to play on CitizenMP:IV Reloaded ?

No, the client will automatically download a patched exe to use (won't replace any file in the game folder) so that you don't need to downgrade.

2) I receive an error when downloading the required files (example: CURLCODE 0X38)

Disable your anti-virus temporarily or add CitizenIV folder and Launcher.exe to the exclusions and try again. Check for firewall rules if it doesn't get fixed, make sure that CitizenIV client is not blocked.

3) "Unable to find executable" error, what is it ?

This usually doesn't happen as the game detects the game folder for you, but if for some reason it doesn't, please specify the game's folder manually in the CitizenFX.ini in your CitizenIV folder, like this:

Code: [Select]

[Game]
IVPath=C:\GTAIV
Make sure the path is correct, especially if you installed it in a different one than above.

4) I'm stuck on an infinite loading screen, what should i do ?

First make sure that single player is working, then check your game folder for any commandline.txt and remove it.

If that doesn't work, delete the cache folder inside CitizenIV folder

If that doesn't work either and you have any mods installed (scripts, plugins, ENBs, graphic or texture mods as well) try removing those first.

None of the above solutions worked? Please open a new thread in this board or alternatively head to https://citizeniv.net/t/support and ask for support to the client developers. 

5) How do i use the Commandlines properly ?

There is a very well explained guide on how to set up your commandline.txt for your PC configuration, please have a read at this thread on GTAForums.


6) After logging into the server my game starts to lose textures and/or i have major flickering and stuttering

You can first try to set a -memrestrict line into commandline.txt, this is how you should use it:

Please do not use any other commandlines as they may override the effects of this one. Start at the lowest number based on your texture setting (ie. try them one at a time) You can try to increase the number until you notice stuttering again.

-memrestrict 188743680 LOW TEXTURES (256M Video Cards)
-memrestrict 209715200
-memrestrict 230686720
-memrestrict 262144000 MED TEXTURES (512M Video Cards)
-memrestrict 293601280
-memrestrict 314572800
-memrestrict 629145600 HIGH TEXTURES (1Gig+ Video Cards)
-memrestrict 650117120
-memrestrict 681574400

If you still notice stuttering with the lowest number, there may be a separate issue with your system configuration.

Source: GTA Forums

Please note that GTA:IV (even EFLC) has its own stuttering and massive fps drop in some areas due to the poor port that Rockstar made on PC. There is no fix for that, even the best configurations struggle with this game.
Credits

CitizenIV Reloaded developers and community.
GTA Forums for being our number one source of knowledge.
IV:MP Community for providing feedback and supporting this game.
[Rstar]Twenty for the logo edit.

Last update 17/11/2020

[Mark]

reserved