Java APIs

I'm attempting to retrieve a Windows error code from a remote system, using a simple call to the Windows API function getLastError() which is wrapped inside a JNI function on the remote system. getLastError() returns the last error code set for a particular process/thread.

The problem is, it appears that simply making the remote function call clears the error value before it can be returned. I can confirm that the error value was set on the remote system by printing the Process/Thread ID and getLastError() value to a console window on the remote system when one of my remote methods is called with out-of-range data. If I attempt to retrieve the error code, the Process/Thread ID match but the error code is always 0. No other methods were called on the remote system in between the initial error-generating method and the method which returns the error code.

Note that using the same JNI function calls without RMI works fine - I can generate error codes and retrieve them just fine.

Any ideas? Thanks in advance!