how to change the interation of a EPMDocument using Java

Hello users

I have a need to change many EPMDocuments Iterations for cleaning up a database in Windchill. Does anyone know how to change a iteration of a EPMDocument using the Windchill Java API? I know how to change the revision of an object using the Java API but not a iteration. I might have to do this in a Oracle script but I really want to know how to do this operation in Java.

Thanks for any help.