DSNB204I OPEN OF DATA SET FAILED. DSNAME = dsn

Explanation

A required data set of a Db2 table or index space could not be opened. The error was detected by the media manager CONNECT function that issues system message IEC161I. The dsn indicates the DSNAME of the data set.

After being issued for a given data set, this message is disabled for that data set.

System action

Buffer manager functions that detect this condition terminate.

Operator response

Notify the system programmer.

System programmer response

To determine the cause of the error, refer to system message IEC161I in the appropriate MVS publication. Correct the error, and reinvoke the application.

Problem determination

Collect the following diagnostic items:
  • Console output from the system on which the job was run, and a listing of the SYSLOG data set for the period of time that spans the failure.
  • A listing of the SYS1.LOGREC data set, obtained by executing IFCEREP1.
  • IDCAMS LISTCAT output for the ICF (VSAM) catalog that contains the Db2 subsystem catalog that defined the failing index or table.
  • VTOC listing of the disk volume on which the failing operation occurred.
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