We are on z/OS 1.7 - This morning we had a JCL error and determined that the cause was An x'00' (null) between a STEPNAME and its corresponding EXEC directive. We changed The null to a x'40' (space) and everything worked fine. The programmer that created the JCL Claims that the JCL with the embedded null worked okay under z/OS 1.4 during testing. I'm Not sure I believe that. Anyone with knowledge of the effect of nulls in JCL and any behaviorial Changes between z/OS 1.4 to z/OS 1.7.
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