For internal use, we installed the Pentaho CE version locally using the olapFormatter.jar library which defines a UserDefinedFunction.
The library was installed in "pentaho-server-ce- / pentaho-server / tomcat / webapps / pentaho / WEB-INF / lib" as it was installed on the Pentaho EE.
In Pentaho EE it works well, while in Pentaho CE when I try to load the model with the UserDefinedFunction, this is not displayed in the model form?
Both olap models loaded on both the Pentaho EE and the Pentaho CE are identical.
No errors appear from the logs.

If I load the model without the UserDefinedFunction, it is works fine!
Can you help me please?