Warning: There is no class model available for code generation in Visual Paradigm

I'm dealing with a problem in my Visual Paradigm project. I created some Java sources and I did instant Reverse with them. Then I dragged the model elements of the classes to the Class diagram. I modified the class diagram adding some operations to these classes and I tried to update the code.

But I got the warning

"There is no class model available for code generation" 

and the Java sources have not been updated with the new operations.

Could someone help me with this error?

Solution 1:

Check the version of your SDE. Versions lower than 4.2 are not well maintained. Moreover the integration capabilities have been merged with Visual Paradigm-UML now. Its Latest Version is 14.0 right now.