Registrating a Java UNO Addin in an LibreOffice for which the JRE is disabled (by disabling "Use a Java runtime environment" in Perferences->Advanced) will result in the error message Could not create Java implementation loader This message is unhelpful. Fix: Improve the error message to s.th. like "This add in requires a Java runtime. Please enable the Java runtime in ...."
To reproduce: - Disable Java runtime in Preferences->Advanced - Download Obba.zip from http://www.obba.info and install Obba.oxt from "Obba for OpenOffice"
I reproduce the problem with LibreOffice 4.1.4.0.0+ and the master. This exception is triggered here : http://opengrok.libreoffice.org/s?defs=CannotRegisterImplementationException&project=core I agree that a more clear error message would be better. Note: in fact the extension is installed (try a second time to install, you will get a message asking for reinstalling or canceling). Best regards. JBF
Although this might be the first report chronologically, the other report has an analysis about what to do to address the problem. *** This bug has been marked as a duplicate of bug 112723 ***