This warning displays if you don't have enough available memory on your system to use your current settings.
This article explains the process of speaking to a Game Master (GM).
Diablo II System Requirements
Instructions on lowering the maximum frame rate.
Command line arguments for Diablo II.
How to ignore another player in Diablo II
If you are receiving unhandled exception errors, follow the steps below.
Information on error BLZ51900011
Troubleshooting steps to resolve error message in World of Warcraft.
Error message information for classic Blizzard games.