Error Code RMN40 when playing GTA IV in Windows XP : Rockstar Support

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Error Code RMN40 when playing GTA IV in Windows XP

Rockstar Games
posted this on March 09, 2011 10:20 am

Question: I'm using Windows XP and get an Error Code of RMN40 when I launch the game. What do I need to do?

Answer: Windows XP SP3 is required to play the game. Click the link below to download and install:

Please note that this download is over 300MB and the installation can take up to an hour. This issue can also occur in Vista if you are running Steam in XP compatibility mode.