Round End Sentry Bolt Bug

[SecretMan]

ERROR in
action number 1
of Begin Step Event
for object Client:

In script ClientBeginStep:
In script buildSentry:
Error in code at line 22:

player.object.nutsNBolts -= 100;
   ^
at position 2: Unknown variable nutsNBolts

Did a player destroy his sentry when the round ended and the other picked it up?

EDIT: The error appeared at the next map and i crashed.