Sporadic setLastError in java application

Hi all -

I have a couple of different java applications (1 ejb and a war) that run in the same JVM in a network deployment of IBM WebSphere.  In both applications, I deploy a version of the FPLibrary.jar.  The native libraries are configured in the LD_LIBRARY path at the JVM level.  I've been running this configuration for about 3 years.  I recently moved the some of the Centera functionality from the war to a new EJB in my development environment.  The new EJB will sporadically fail with the com.filepool.natives.FPLibraryNative.setLastError error,as if it can't find the natives.  However, it can run for several days without problems, then throw this error and die.

Any ideas as to what the problem may be?  Is there a problem with running multiple applications, each with their own version of FPLibrary.jar deployed?  Perhaps I should deploy FPLibrary.jar as a shared library?

Thanks, Rob