SAP Message USMD2240 - Print preview not possible; error while creating Adobe PDF form

Diagnosis The system is unable to generate the PDF form for the print preview. Onecause for this might be that the definition of the interface of formV1 contains an error: the form interface must have only one occurrenceof the customer-defined import parameter IS_DATA, the type ofwhich is defined in Customizing for the structures to be generated. Procedure for System Administration Check the interface of form &V1&.