INSERTIMM

Specifies whether ACIF is to insert an Invoke Medium Map (IMM) structured field before the first Begin Page (BPG) structured field of every named page group.

INSERTIMM={YES | NO}
The values are:
YES
Specifies that ACIF inserts an IMM before the first BPG structured field in the named page group if no IMM was encountered within the named page group.
NO
Specifies that an IMM is not inserted before the first BPG structured field.
If this parameter is not specified, ACIF uses NO as the default.