Accidentally, we left one of the error messages in Polish. The English translation is:
Internal program error has occurred
1. Free more space on disk C:
2. Check CD-ROM disc
3. Clean CD-ROM drive
4. Reinstall DirectX drivers
5. Reinstall game
6. Reinstall Windows
In most of the cases the first solution resolves the problem - the system needs more free space for the swap file in order to satisfy Reah's memory requirements. Usually the swap file is created on disk C:, therefore you should make more space on that drive or on any drive you configured for your swap file. Also if you set up the permanent swap file with the fixed size, increase its size.
Some users also get this message in case when some of Windows multimedia components are not installed. Make sure that you installed all multimedia components from Windows 95/98 setup disc. In order to do so, start Control Panel, click Add/Remove Programs, select Windows Setup tab and then check Multimedia Components checkbox. When some of them are missing, the system will ask for Windows Setup disc and install the missing stuff.
This message is displayed in English in some versions of the game. There're no localized versions of this particular error message, all others are localized though.