Gregory Stigers writes: >I have browsed *some* of COBCAT.PUB.SYS; my eyes glazed over. I did grep >and find some entries similar to "641 FILE IN USE BY ANOTHER PROCESS >[9x] (COBERR 641)". OK, that's closer to what I want, except what would >the value of "x" be in this case? 641 is not "between 0 and 255, >inclusive". COBERRs are not to be confused with FSERRs. They are two entirely different animals. In this particular case I would expect the "x" to be either 90 (Exclusive violation; file being accessed) or 91 (Exclusive violation; file accessed exclusively). For a "complete" list of File System Error Codes see table 4-2 in the MPE/iX Intrinsics Manual. BTW this table lists codes from 0 to 312! So much for 0 to 255! Jim Phillips Manager of Information Systems E-Mail: [log in to unmask] Therm-O-Link, Inc. Phone: (330) 527-2124 P. O. Box 285 Fax: (330) 527-2123 Garrettsville, Ohio 44231