I suggest you repeat your test, but don't zip/unzip the file. If this works then it is the zip/unzip causing the problem. If it doesn't work then you can conclude that your transport file is not correct.
BTW a transport file on MVS has to have certain file characteristics (eg RECFM = F, LRECL = 80, BLKSIZE = ??). Check the documentation as I am quoting this from memory. It is my understanding that a transport file is always created in ASCII regardless of the platform it is created on, hence the need for the binary transfer.
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