The driver version 8.4-701 adds the CopyAPI. Unfortunately the refactored CopyAPI breaks our database unit tests. The symptom is that it reports that the database stream is closed when it is trying to flush it. For now, we have decided to replace the new, broken CopyAPI by the old, working CopyAPI. 

The new CopyAPI has also a slightly changed interface, i.e. it removes copyIn() and copyOut() and renames copyInQuery() to copyIn() and copyOutQuery() to copyOut(). We followed this change in the API, as we hope to be able to replace our patched version with the plain-vanilla driver once the problem mentioned above is fixed.