This just happened while I was watching the console on cha0s primary:
L 06/15/2012 - 23
3
1: [SM] Plugin encountered error 15: Array index is out of bounds
L 06/15/2012 - 23
3
1: [SM] Displaying call stack trace for plugin "nd_squad_management.smx":
L 06/15/2012 - 23
3
1: [SM] [0] Line 100, /home/groups/alliedmodders/forums/files/1/7/9/3/9/7/104119.attach::CMD_JoinSquad()
L 06/15/2012 - 23
3:46: [SM] Plugin encountered error 15: Array index is out of bounds
L 06/15/2012 - 23
3:46: [SM] Displaying call stack trace for plugin "nd_squad_management.smx":
L 06/15/2012 - 23
3:46: [SM] [0] Line 100, /home/groups/alliedmodders/forums/files/1/7/9/3/9/7/104119.attach::CMD_JoinSquad()
It happened just after a reserved slot kick.