Problem with a jar file rebean.wi when updating 3.1 to 4.1

I'm updating our java application using the SDK and I met an issue with the jar rebean.wi.jar.

In our jar from 3.1, we have the class com.businessobjects.rebean.wi.occa.WebiReportEngineFactory

But in the jar I get from the installation folder of BO 4.1, we do not have that class anymore.

Can you help me?

Thanks in advance !