A JCL job might be running that has the file allocated with DISP=OLD.
If a CICS region has the file open, it often holds an exclusive lock. mvsckey not found exclusive
Use the system command D GRS,RES=(*,dataset.name) to see who currently owns the resource. This will tell you the Job Name and the type of lock (Shared vs. Exclusive). 2. Check Job Dependencies A JCL job might be running that has
Ensure your error-handling routines include steps to release resources if a process fails. mvsckey not found exclusive
The most frequent culprit is a "locked" dataset. Here is why it happens:
Another user might be editing the dataset in ISPF.