Yes, you're right! BK was set to 1. When I just commanded D BK=0 I was able to SA/NV. Does Carl have BK=0?Does this mean I must choose between having BAK files and using UNDO? UNDO would seem to supersede BAKs anyway.** Reply to message from Harry Binswangeron Sun, 13 Jul 2008 23:30:46 -0400 > the trouble is with the "/nv" part of the command It has zero to do with "/NV" (there's no way that can affect anything). It has everything to do with Variable BK. I wager you've got backups turned on: VABK=1 -- I can't think of anything else that would block a file with extension .BAK. Reset to zero (d bk=0 ), and everything will probably work. ----------------------------- Robert Holmgren holmgren@xxxxxxxx ----------------------------- Harry Binswanger hb@xxxxxxxx