Cause . . . . . : Program device &4 was not defined for file &2 in library &3 because the ACQPGMDEV specification from the CRTMXDF or OVRMXDF command contains a program device that is not defined. Recovery . . . : Define the program device using the correct ADDBSCDEVE, ADDCMNDEVE, or ADDDSPDEVE command, and then try the command again.