Hi

Can anyone please help on this one.
I have a user who allocates a file with CYL,(100,100)). The file then gets 
closed and opened 780 odd times and data is added to it with each open. He 
has tried it with different file names. The SMS DATACLASS and STORAGE 
CLASS do not allow for space to be released and force the allocation to be 
one a single volume. Some where during all this space is been release because 
the step failes with an SB37. The file has changed to CYL,(1,1)) and is in 16 
extents. When allowing the file to have multi volume access it works, but 
changes to CYL,(1,1)) and ends up been in 39 extents. 
My question is this, is SMS releasing the space or MVS or the program? 

Kind Regards
Karl Abrahams

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