Yes, SIGUSR1/SIGUSR2 are used by the pthreads library. You can't use them. Helmut At 17:33 13.04.00 -0400, you wrote: >Is there something special about handling SIGUSR1/SIGUSR2 signals in an >application using omniORB? SIGINT seems to behave as expected. > >I am on Digital Unix 4.0. > >Neeraj Bhatia