<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.4"?>
<plugin>
   <extension
         id="id1"
         point="org.eclipse.e4.workbench.model">
      <fragment
            uri="fragment.e4xmi">
      </fragment>
      <processor
            beforefragment="true"
            class="com.example.e4.rcp.contribute.Processor1">
      </processor>
   </extension>

</plugin>

<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.4"?>
<plugin>
   <extension
         id="id1"
         point="org.eclipse.e4.workbench.model">
      <fragment
            uri="fragment.e4xmi">
      </fragment>
   </extension>

</plugin>

Remove reference to missing class for processor
Remove reference to missing class for processor