Create Port and Interfaces does not generate interfaces for messages that are operations in IBM Rational Rhapsody.
This document applies only to the following language version(s):
Why are interfaces not created for messages that are operations, when you run "Create Port and Interfaces" in the SE Toolkit for a sequence diagrams in IBM Rational Rhapsody.
You have to set the property:
Once you set the above property and then run the SE Toolkit -> Create Ports and Interfaces in your Sequence diagram then it will work as expected.