IDF runs on these operating systems, and unless otherwise stated, on subsequent versions, releases, and modification levels of these systems:

z/OS

OS/390® Version 2 or z/OS Version 1

Required:

TSO/E Version 2 or higher
DFSMS/MVS™ 1.3 or higher

For more information, see Debugging programs on z/OS.

CMS

VM/ESA Release 2

For more information, see Debugging programs on CMS.

z/VSE

VSE/ESA Release 2.3

For more information, see Debugging programs on z/VSE.