Engine having problems loading nested classes

Question

Hi all,
We are having the strangest problem:
We are using PAPI to create an instance of a process by passing a complex class, that we have defined, in the BeginIn argument set. Some classes are loaded successfully by the JVM, others cause the Engine to throw a ClassNotFoundException. Here's an example:
ClassA has 3 members:
ClassA
---ClassB
---ClassC
---LinkedList<ClassD>
Classes A, B, and C are all loading fine. Class D cannot be found.
Here's another example:
ClassA has 3 members, ClassD contains instance of ClassE:
ClassA
---ClassB
---ClassC
---ClassD
---ClassE
Again, Classes A, B, C, and D are all loaded, but ClassE cannot be found.
All classes are in the same JAR file, in the same package, and all are cataloged into BPM under the same directory.
I'm using BPM 6.0.3 on Weblogic 10.0.0.1
The PAPI code is being called from a different server than the engine is running on.
Any ideas why nested classes are causing this kind of problem?
Thanks,
-Ken

Answer 1

OK
Here is another twist to whoever may be reading this thread.
When the EJB containg the PAPI call and the BPM Engine are on the same Weblogic server, the code works fine. When the EJB and the Engine are on different Weblogic servers, the Engine throws the "ClassNotFoundException". It is definitely the remote Weblogic server containing the Engine that is throwing the Exception.
It seems as though the engine and the PAPI code are having difficulty communicating through RMI...