Solution : https://service.sap.com/sap/support/notes/1103589 (SAP Service marketplace login required)
Key words :
explanatory---------- ------------------ ----------------502 invalid becon number ticknote, length checking ruletax number2 06 42, enter message class 'ar', prerequisites legal requirement, attached correction instructions, latest support package, message short text, becon number stored, becon number bupa_tax_number_check4, terms tax number
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