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M204.0454  Unable to open file dataset ddName codeType code literal userCode

An error occurred while attempting to open the ddName data set. The message identifies the type of error, which may be an Abend code, a User code, or an Abend/Reason, depending on the type of abend.

For instance:

  • A system Abend code of X'0913' indicates an OPEN subtask failure.
  • A system Abend/reason of X'0213'/4 indicates a missing data set.
  • A User code of X'0100' indicates an invalid LRECL/BLKSIZE/DSORG.
  • A User code of X'0101' indicates an attempt to open a file that has not been CREATEd or INITIALIZEd.

Response: Verify that the file you are attempting to open has been defined to Model 204. If your operating system has a security package such as ACF2 or RACF, check that the Model 204 Online is authorized to access the data set. Contact your system manager if the problem persists.

System manager response: Refer to your CCAAUDIT output or console log for more specific messages related to the open failure. Correct and rerun Model 204.

If there are no further error messages to assist you, contact Technical Support with the following documentation ready:

  • Audit trail
  • Snap dumps

Message attributes:

RETCODEO=0Sets online return code
RETCODEB=4Sets batch (single user) return code
CLASS=EError class; the message can be suppressed with the X'04' bit setting of the MSGCTL parameter
AUDITERWrites the message with line type ER to the audit trail
COUNTIncrements the error count (ERCNT) parameter

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