CA R19 Upgrade
Article ID: 130325
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Can the installation of R19 go over R15? Any known maintenance for upgrade to Z/os 2.1?
Answer Yes you can install R19 over R15, and R19 is compatible with Z/so 2.1 here's a link:
https://support.ca.com/phpdocs/0/MSPSaccount/COMPAT/D.HTML This will show you any necessary PTFs.