BDE shoud return an explicit error message when an error is returned

When reproducing BDE-183, you can notice that although an explicit error message exists in server.log, no error is returned to the user launching the NXQL query:
The user gets no result, that's all.
No way for him to decipher whether there is actually no result or there is actually an error.

Expected result: when provoking an error, the user should get at the very least an error message, and if possible an explicit one.