Upgrading to IDMS R18.0 requires special handling for user configurable tables as their implementation has changed.
CA IDMS v18.0 introduced changes into how user configurable modules and "named" exits are managed. Thus most will need to be reassembled/linked when upgrading to v18.0 or 18.5 directly from an earlier release. See 18.0 Release Notes chapter "Separation of User-Configured Modules" for details. Here is a summary of how various modules need to be treated on the upgrade:
Release: IDADSO00100-18.5-ADS-for CA-IDMS