DFS1736I SC=08 STACK NOT FOUND FOR IDENTIFIER SPECIFIED IN 'UNSTACK' STATEMENT. 'UNSTACK' STATEMENT IGNORED

Explanation
 An UNSTACK statement identified a stack that was
not currently in real storage.

System action
 The UNSTACK statement is ignored and processing
continues with the next source statement.

Programmer response
 Validate the spelling of the stack identifier
or specify the KEEP option on a previous UNSTACK statement with the
same stack identifier.