Assembly / HLASM · Message ID
What does IEC143I DASD OPEN Failure Message mean in Assembly / HLASM?
The companion message to abend S213 — issued when OPEN processing fails for a dataset on direct access storage because the system can't find or verify the dataset's Format-1 DSCB, the VOLSER on the DD doesn't match what's mounted, the dataset was cataloged but has since been deleted, or the DSNAME is simply misspelled. If the dataset name shown in the message carries a PATH= specification instead of an ordinary DSN, the failure is actually with a z/OS UNIX (HFS/zFS) file, and the DSCB/VOLSER troubleshooting below doesn't apply.
The companion message to abend S213 — issued when OPEN processing fails for a dataset on direct access storage because the system can't find or verify the dataset's Format-1 DSCB, the VOLSER on the DD doesn't match what's mounted, the dataset was cataloged but has since been deleted, or the DSNAME is simply misspelled. If the dataset name shown in the message carries a PATH= specification instead of an ordinary DSN, the failure is actually with a z/OS UNIX (HFS/zFS) file, and the DSCB/VOLSER troubleshooting below doesn't apply.
Confirm the dataset genuinely exists on the volume named in the message with LISTCAT or a dataset list, correct any hardcoded VOLSER that no longer matches reality, and re-catalog or restore the dataset if it was removed — but if the message names a PATH= dataset, treat it as a Unix System Services file/mount problem and check the file's actual path and permissions instead of the catalog.