If you have installation-written UIMs that currently run with MVSCP, you need to convert those UIMs to run with HCD because the requirements for an HCD UIM differ from those for an MVSCP UIM.

The major changes are:

• Rename the UIM from CBPUCxxx to CBDUCxxx
• Recode the UIM to use the new/changed service routines and macros
• Code the UIM data table (UDT).
• Add help panels
• Install the UIM and associated UDT in SYS1.NUCLEUS or the UIM library defined in the UIM_LIBNAME statement in the HCD profile. For IPL, the UIMs and associated UDT must be installed in SYS1.NUCLEUS; for testing purposes, you can install them in the UIM library defined in the HCD profile.