During the LNKEDT step for USRIDXIT with IDMSSTRT getting the following:
UNRESOLVED EXTERNAL REFERENCES EXTRN TMMCEP1
Release : 18.5
Component : IDMS/DB
Up to IDMS 17.0 the USRIDXIT is enabled for batch jobs by linking it together with module IDMSSTRT.
SQLIWXTR is a weak external so it's not a problem if it's unresolved.
For the unresolved reference to TMMCEP1 add:
For IDMS 18.0 and later releases, the USRIDXIT is enabled by linking it together with module IDMSUXIT and must have an entry point of USRIDXIT.