"STOP NO CHANNEL SELECTED" appears!

Dear FLUKA experts,

          When I has submitted 128 jobs on server today, I find one of
my jobs aborts run and shows the following
errors:
  Abort called from ICLSSF reason NO CHANNEL SELECTED Run stopped!
  STOP NO CHANNEL SELECTED

       My fluka is the last version 2011.2.4 download this morning. How
to avoid these errors?
       Thank you very much!

                                                                 Hantao Jing
                                                                  2011-8-8