An attempt to open the DFSMShsm control data set specified by DDNAME=ddname was unsuccessful. VSAM failed the attempt with OPEN reason code X'reason-code'.
If the error occurred while opening the MCDS during DFSMShsm startup, the startup of DFSMShsm is incomplete. For other cases, DFSMShsm processing will be limited, depending on the control data set in error.
For an explanation of the failure, see the IEC161I message preceding this message. For additional information, see Macro Instructions for Data Sets, VSAM Macro Return and Reason Codes for OPEN reason codes in the ACBERFLG field of the ACB. Correct the problem and restart DFSMShsm.