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David Gibbs wrote:
I'll call IBM tomorrow and open a PMR.

IBM's response:

The difference in behavior in V6R1 and later releases is due to a change that was made in V6R1. Prior to V6R1, aggregates were always returned in storage so declaring the return value the wrong size and grabbing the left-most byte worked because of that particular implementation detail. In
V6R1 and later releases, the translator changed how small aggregates are returned. Aggregates 8 bytes or less are now returned in a register. The data is right justified in the register so when it is assigned into static storage for the variable it remains right justified.

At the time we recommended the coding technique you are currently using it was a workaround that was valid, but due to unforseen (at the time we provided the workaround) changes in the translator code at 610, the workaround is no longer valid. The 'official' published method in our doc has always been (since OS version 510) to define the return value in CL as 1 character and use the EXTPROC(*CL:'CALLED_PROC') in the procedure.

Therefore we are saying that this is working as designed.


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