I have looked for the solution in SDN, and hasn't been answer to satisfaction and i have tried the suggestions and still get the same message.
This error takes place when trying to unhide fields that were added to a Data Source via and append structure. This structure has fields that need to have reference in this case currency.
I have created a reference within the structure as Anil Kumar suggested but it doesn't do anything. Has anyone had this problem and solve it.. please share detail information ..