It appears that our LISTSERV-NT started sending these errors a week ago. Error occurred while processing file 75765538 from LISTSERV@[many hosts]: Error X'0028004B' writing X-SUPD CMSUT1. Error traceback follows ----------------------- >>> Error X'0028004B' writing file D:\Listserv\MAIN\X-SUPD.CMSUT1 <<< -> Severity: Error -> Facility: LFxxx routines -> Abstract: Record length larger than 65535 -> I/O mode: Block write Rebooting LISTSERV and the entire server (with a CHKDSK /F) did not help. There is plenty of disk space, and we never had problems like this. Any ideas?