Explanation
Not enough main storage was available to perform
the initialization functions of DFSMSdss. Message ADR018I follows this message
to indicate the storage needed.
System action
Processing ends. The return code is 12.
Operator response
Programmer response
Probable user error. One of the following
responses is appropriate:
- Increase REGION value in the JOB or EXEC statement to at least
the value indicated by message ADR018I, and retry.
- If the SIZE= parameter was specified, increase the parameter value.
This value must not exceed the storage available in the REGION value.
Source