Partitioned data sets tend to become full and require compression. When a target data set runs out of space during a promote, promote attempts to recover and continue the promote. Although you get system ABEND messages, the promote ignores the ABEND and continues. However, processing bypasses making a copy to this data set and it also bypasses the subsequent purge step for members that were not copied.

If data set overflow occurs, follow these steps:

1. Compress or reallocate the data set with larger space allocations.
2. Increase the directory block allocation, if necessary.
3. Promote again.

The second promote copies only the members that did not copy in the original promote. If successful, the purge step is normal. The resulting promote report identifies only the copied and purged members in the second promote.