BA24 restart gets DB RC 94(177)

Document ID : KB000097689
Last Modified Date : 23/05/2018
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Issue:
I aborted a Block Size Alter (BA24) running on a Datacom area. They I tried to restart the BA24 on the same area via DDUTILTY but the job failed with:
 **** ERROR ****  DB RETURN CODE = 94 (177)   BLOCK ALTER 24X7
Cause:
On the MUF joblog I see:
DB02831E - BLOCK ALTER 24X7 nnn aaa ERROR COMPLETE, OPEN 

The error is that you are doing a BA24 after a previous BA24 for the same area without the base being closed and reopened.
Resolution:
Close and reopen the involved area to restart the Block Size Alter process