If you plan to reference a PowerBuilder dynamic library (PBD) that was created in an earlier version of PowerBuilder, you must regenerate the PBD file in the new version of PB IDE, and then migrate the application.
For example, if your application contains a base.pbd file, you should generate a new base.pbd file from the base.pbl file and replace the old base.pbd with the new base.pbd before migrating the application.
