XSLT mapping with Java

Hi,

I'm trying to do my first XSLT mapping. For that, I'm testing the SAP example found in XI help: it's a concatenate function between a FirstName and a LastName which uses Java function "Merge".

But... I have this error:

<i>Unable to find resource com/company/group/MappingClass.class (http://test, -1) in the following software component versions: 60530c50-5a4c-11d9-9740-cb29ac1601f1</i>

Do I declare the Java class "MappingClass" or "Merge" function somewhere in XI?

Regards.

Mickael.