What are the command line return codes for scm.exe in scmTools 6.0.3?

One answer

The version you use is out of support. In general you can find the documentation in the EWM product documentation e.g. for a current version: https://www.ibm.com/docs/en/engineering-lifecycle-management-suite/workflow-management/7.1.0?topic=reference-source-control-command-line
It does not list the errors. If you want to discuss your error, you would have to provide the information needed.