I keep getting this with the simple plugins core and with simple spectate loaded. I use SourceTV on the server so I guess that could be the problem here.
Code:
L 09/08/2009 - 21:39:53: [SM] Native "ThrowNativeError" reported: Bots are not supported
L 09/08/2009 - 21:39:53: [SM] Displaying call stack trace for plugin "simple-plugins.smx":
L 09/08/2009 - 21:39:53: [SM] [0] Line 574, C:\Compiler\scripting\simple-plugins.sp::Native_SM_ClearBuddy()
L 09/08/2009 - 21:39:53: [SM] Native "SM_ClearBuddy" reported: Error encountered while processing a dynamic native
L 09/08/2009 - 21:39:53: [SM] Displaying call stack trace for plugin "simple-plugins.smx":
L 09/08/2009 - 21:39:53: [SM] [0] Line 182, C:\Compiler\scripting\simple-plugins.sp::OnClientDisconnect()