PowerBuilder runtime DLLs are designed to be run in a client app not in a server app.  So even if you somehow do accomplish this, it is not going to be scalable and fault tolerant.  Therefore I don't recommend you do this.  However, if the Java app is a client desktop app then this would not have such problem/risk.

I think you would have to write a C++ DLL with functions that are callable from Java and use PBNI functionality to call PB from C++.

Thank you for the suggestion, Roland and Armeen