ASMDCMS010E File name omitted and FILEDEF '`ddname`' is undefined

Explanation
You have not included a file name in the ASMD command, and no
FILEDEF could be found for the ddname specified.

System action
RC=24. Processing of the command terminates.
The system remains in the same status as before the command was entered.

Programmer response
Reissue the ASMD command and specify a file name, or issue a
FILEDEF for the ddname specified.