Solution : https://service.sap.com/sap/support/notes/813742 (SAP Service marketplace login required)
Key words : 
structure named mara_ser solution, terms nullpointerexception material reason, prerequisites error due, downloading material, jco$server, middlewarerfc$server, nullpointerexception, middlewarerfc, rfcdecoder, recalculateoffset
Related Notes : 
       
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