Hi Eric & Amy, Got the following problem using zap or alld... AIPS 2: ZDESTR: ERROR DESTROYING FILE DA05:MAD02Q001.1IN; IERR= 4 AIPS 2: ZERROR: ON FILE DA05:MAD02Q001.1IN; AIPS 2: ZERROR: IN ZDEST2 ERRNO = 22 (Invalid argument) AIPS 2: FAILED TO DESTROY MAIN FILE, ERROR 4 --Ideas? --Glenn