I have run into this error message a number of times. Every time I have
tracked it down to 1 of 2 things:
1. A catch statement that tries to trap an error that is not available, for
example, and exception innerexception.message, which may not necessarily be
available,
or
2. A completely unhandled exception in the code.

   If I understand you correctly, this is probably not much help since you
do not have direct access to the code.

   You could try 2 things, run your program in "debug" mode to see if it
sheds some light on the error, or try to use the reflection classes to view
what is in the code.

Jeff