1. Go into the TDF, and see if the member actually exits, and has not been deleted by
doing an UP Screen Definition
2. Run JREORGWK, to DEL/DEF and reinitialize the WIP (Work In Process) files, to see if there are any "LIVE" records left over from the last time this member was edited in the TDF (Telon Design Facility).
3. Check to be sure you are allocating the correct VSAM files
4. Another possibility is, that it may not be an SD, (could be a BD or ND).