>What I did : this 191 is sharing with a user in another z/VM This sounds like one of two things:
1) You had two virtual machines who both had R/W access to the disk. Don't do that, it will hurt (the disk contents will be destroyed). CMS minidisks do not support multiple concurrent R/W access. 2) You had it R/W by one machine and R/O by another. If so, then you're OK but the error occurred because the machine with the R/W access rewrote the file, so the R/O copy was pointing to the wrong set of disk blocks. Then when the R/O copy was read, it wound up with a block of data from some other file and was thus confused by the contents. If case (1) is true, then I highly recommend you copy all the files off the disk to another one, reformat the disk (simplest), and copy them back. Otherwise you don't know what dangers are lurking.
