LSMW after Upgrade on mySAP ERP 2005 is Fields lost

We use LSMW version 4.0.0. After Upgrade of 4.7 on mySAP ERP 2005 parts of Fieldmappings are no longer present. Project concerned has the following characteristics: Business Object method BUS1001006 method SAVE DATA. Use Extension E1BPPAREX/E1BPPAREXX The Fieldmapping to the Extension is missing. Unfortunately the 4.7-System is not present, so that I cannot make from the system a reconstruction.