Just testing this on my test server
Code:
L 04/25/2011 - 13:45:46: [SM] Native "ClientCommand" reported: Client index 0 is invalid
L 04/25/2011 - 13:45:46: [SM] Displaying call stack trace for plugin "rankme.smx":
L 04/25/2011 - 13:45:46: [SM] [0] Line 216, rankme.sp::Command_SayChat()
L