DFS0908I PSB psbname IS NOT A VALID PSB
Explanation
The PSB indicated was not in a recognizable format for IMS.
System action
Abend 0908 is issued if batch DL/I was running. ACBGEN processing continues if the ACBGEN utility was being run.
Programmer response
Create the PSB using the IMS PSBGEN, and rerun the program.