remove() is expected to fail in this scenario sometimes depending
on how writemsg() is used - in the error case, the user was trying
to edit his .plan file with the ;plan command:
term Node 10 <Deuce> !ERROR 11 (Resource temporarily unavailable) in writemsg.cpp line 1232 (editfile) removing "/sbbs/node10/temp/INPUT.MSG" access=0

Thanks for the bug report!