I have just instaled Unique Constraints Server Extension 4.1.4.1 from downloaded files, following the Documentation, but it did not work.

I just Set the ClassPath as described in the version 4.1.1 documentation pointing to the files downloaded with 4.1.1 I use the Private Classpath in the Tamino Manager ( xmlParserAPIs.jar ; xalan.jar ; xercesImpl.jar and jaxp.jar)

So, it runs fine

Hello.

You didn’t mention which Tamino version you installed the Server Extension into - was it 4.1.1 by any chance?

The 4.1.4.1 Server Extension is intended for Tamino 4.1.4 (not 4.1.1), so it has not been tested with Tamino 4.1.1… although it should work okay. [Fingers crossed.]

The Server Extension uses some parser classes. Tamino 4.1.4 ships with Java 1.4.1, which includes the necessary classes.
Tamino 4.1.1 shipped with Java 1.3.1, which does not include the necessary parser classes - thus the need for the private classpath with 4.1.1.

Trevor.