I'm still getting this error in the latest version:
L 07/06/2014 - 01:22
5: [SM] Displaying call stack trace for plugin "sm_knifeupgrade.smx":
L 07/06/2014 - 01:22
5: [SM] [0] Line 446, /home/forums/content/files/2/3/8/4/7/5/135267.attach::IsValidClient()
L 07/06/2014 - 01:22
5: [SM] [1] Line 216, /home/forums/content/files/2/3/8/4/7/5/135267.attach::Timer_Welcome()
L 07/06/2014 - 01:53
6: Error log file session closed.
L 07/06/2014 - 02:17
3: SourceMod error session started
L 07/06/2014 - 02:17
3: Info (map "de_mirage") (file "errors_20140706.log")
L 07/06/2014 - 02:17
3: [SM] Native "GetClientTeam" reported: Client 31 is not in game
L 07/06/2014 - 02:17
3: [SM] Displaying call stack trace for plugin "sm_knifeupgrade.smx":
L 07/06/2014 - 02:17
3: [SM] [0] Line 446, /home/forums/content/files/2/3/8/4/7/5/135267.attach::IsValidClient()
L 07/06/2014 - 02:17
3: [SM] [1] Line 216, /home/forums/content/files/2/3/8/4/7/5/135267.attach::Timer_Welcome()
L 07/06/2014 - 02
4:11: Error log file session closed.
L 07/06/2014 - 02
8:13: SourceMod error session started
L 07/06/2014 - 02
8:13: Info (map "de_dust2") (file "errors_20140706.log")
L 07/06/2014 - 02
8:13: [SM] Native "GetPlayerWeaponSlot" reported: Client 13 is not in game
L 07/06/2014 - 02
8:13: [SM] Displaying call stack trace for plugin "sm_knifeupgrade.smx":
L 07/06/2014 - 02
8:13: [SM] [0] Line 187, /home/forums/content/files/2/3/8/4/7/5/135267.attach::OnSpawn()