GTA IV PC FATAL ERROR: RMN40?

Hotfix found! It works for me and runs very smoothly!

1. Go into the GTA 4 folder and locate "LaunchGTAIV"

2. Right click and select "Properties"

3. Select the "Compatibility" tab

4. Under "Compatibility mode", click the box to check off "Run this program in compatibility mode for:"

5. Drop down the menu and select "Windows 2000"

The game runs! The RMN40 error disappears! This is a quick hotfix for the problem and I'm not sure who it will work for extended periods of time but so far it has for me and one other player. This may only be for Vista because I have Vista with SP1 but post your results!!! I think the problem may have been that, at least for me, the game was trying to run in XP SP2 mode when it can't run without SP3! Maybe R* can patch it or maybe my game will crash, who knows? 15 minutes now and its smooth still. I will post my updates as they come... Thanks to leurch77 for finding this out!!

Gta 4 Fatal Error

I'm not sure. I bought the game from Steam and I have Windows Ultimate 64 bit w/ SP1 and I get the same error. All I've been reading is that its a Service Pack problem and that is on the Steam forums as well as GTA forums and so on. If you have XP run SP3 if you have Vista make sure you have SP1. Well I have SP1 and still nothing. I have restarted steam, restarted my system, and uninstalled GTA4 and reinstalled and i get the same error. I'm currently reinstalling but I doubt it will work. Lemme know if you get anything resolved.

EDIT: I got it to work. What I did was I reinstalled my graphics drivers. Even though they were up to date, I guess it was something fishy to do with R* games. Anyway, just go and reinstall your drivers (even if they are up to date which mine were) and see if that works.

````````Hotfix found! It works for me and runs very smoothly!

1. Go into the GTA 4 folder and locate "LaunchGTAIV"

2. Right click and select "Properties"

3. Select the "Compatibility" tab

4. Under "Compatibility mode", click the box to check off "Run this program in compatibility mode for:"

5. Drop down the menu and select "Windows 2000"

The game runs! The RMN40 error disappears! This is a quick hotfix for the problem and I'm not sure who it will work for extended periods of time but so far it has for me and one other player. This may only be for Vista because I have Vista with SP1 but post your results!!! I think the problem may have been that, at least for me, the game was trying to run in XP SP2 mode when it can't run without SP3! Maybe R* can patch it or maybe my game will crash, who knows? 15 minutes now and its smooth still. I will post my updates as they come... Thanks to leurch77 for finding this out!!

1 day ago``````

Matt i`t doesn`t work at me ... ii have XP SP2 but ..don`t work with any choice i`ve chose, anyway ...i don`t reinstal the windows just for this game ... hope reloaded will be for sp2 too

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RE:

GTA IV PC FATAL ERROR: RMN40?

so, after installing and downloading, registering here and there i push PLAY but get this error message:

FATAL ERROR: RMN40

Is there a way to fix it???

I currently have windows vista with service pack 1 and I still get that same error. I don't think it's a service pack problem. I've read that there's suppose to be a patch coming out this week that would fix the problem but nothing more than that. Just FYI for those who might say get sp2, there isn't one for vista.

SP3 is the fix, got this error on Xp pro Sp2. Downloaded Service Pack 3 and wala. Oh and yes FYI legacy there is a Sp2 for vista, only beta out atm.

If you get this error using Vista, you're running in XP compatibility mode. Completely exit out of Steam and check the shortcuts for Steam and GTA4 and uncheck compatibility mode. Then relaunch.

If you then get the MMA10 error, logout of Rockstar Social Club.

I have vista as well with the same error. Rmn40 is suppose to be a xp problem. What a crock of shiot rockstar is. Worst game experience I've ever had.

I had the same problem under vista. Starting the game from the folder didnt do anything.

I just downloaded microsoft .net framework 3.5 SP1 and it worked fine.... also make sure you have vista sp1... both of those are downloadable through microsoft

Make sure the game exe file is not set to windows xp compatibility mode and also make sure you're firewall isnt blocking the game like they said earlier