IBM Mainframe Forum

I have PROG X calling/linked to newly created module PROG Y in same region.

5.5.4.1 When the autoinstall control program is invoked for program autoinstall


For programs, the autoinstall control program is invoked when:

Any of these commands references a previously undefined program:

EXEC CICS LINK

EXEC CICS XCTL

EXEC CICS LOAD

The program is the first program in a transaction.

An EXEC CICS ENABLE is issued for a GLUE or a TRUE.

An abend occurs after an EXEC CICS HANDLE ABEND PROGRAM command is issued and CICS invokes the named program.

CICS calls a user-replaceable program.

For mapsets, the autoinstall control program is invoked when an EXEC CICS SEND MAP or EXEC CICS RECEIVE MAP refers to a previously undefined mapset.

For partitionsets, the autoinstall control program is invoked when an EXEC CICS SEND PARTNSET or EXEC CICS RECEIVE PARTN command refers to a previously undefined partitionset.

Decide whether to use autoinstall for programs.

Using autoinstall for programs can save time spent on defining individual programs, mapsets, and partitionsets. Savings can also be made on storage, because the definitions of autoinstalled resources do not occupy space until they are referenced.

Use of autoinstall for programs can reduce the number of definitions to be installed on a COLD start, thereby reducing the time taken.

Decide which programs to autoinstall.

Depending on your programs, you can choose to use a mixture of RDO and autoinstall. A suggested way to manage program autoinstall is to continue to use RDO for existing program definitions and for installing groups containing related programs. Use autoinstall as you develop and install new applications, and in test environments, where you might otherwise install large numbers of programs at CICS startup.