The 'AgentAddress_TH' parameter is missing a value

I add my own report design in standard report of SalesInvoice_IN, after that i got error “The ‘AgentAddress_TH’ parameter is missing a value” this error. how to solve it. Please kindly response.

In your RDP class set the attribute for Contract Class that attribute must has more the one Parameter (eg : fromDate, toDate) once u refer the RDP class it automatically generate the parameter First then depends on ur parameter the Report will generate.