I have a single stack PO and currently working for a migration project. We have an interface with java mapping which works fine in old system. the same file used to test in PO is not working.
As soon as it goes for the operation mapping, it gives error mentioning Details: java.lang.NullPointerException; Sheet1SheetName Not Defined, NullPointerException: Sheet1SheetName Not Defined.
I have a java mapping to convert Excel sheet into XML . Please note that I am not much knowledageable in java mapping. Any help is appreciated here.