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?