A DC260904 message is a security violation involving discrete DCMT security.
This document explains potential reasons for invalid DC260904 errors.
Release : 19.0.
Component : CA IDMS
If they are not correct, review the JCL which created the IDMSCTAB module. Confirm that the ENTRY point is there. The link-edit statements should be as follows:
//SYSIN DD *
The most recent link edit JCL for IDMSCTAB can be found in the *.CAGJSAMP(IDMSCTAB) install library member.