Work Manager - upgrade of custom java code from 6.0 to 6.2

Dear All,

I'm working on an upgrade project from Work Manager 6.0 to 6.2 and I saw in the Work Manager 6.2 deployment package that the sapjco.jar has been replaced by sapjco3.jar.

So in my custom java code I replaced the import com.sap.mw.jco.JCO.Table by import com.sap.conn.jco.JCoTable;

But I have the following error referring to the old object (JCO.Table) instead of the new one (JCoTable)

So my questions are :

1. Is it mandatory to move from sapjco.jar to sapjco3.jar ?
2. Is there anywhere a documentation with code example up-to-date ?
3. What is the issue in the code ?

Thanks in advance

Regards

Nicolas