I have created the following button:

The function import in the OData service:

When I get the app test I get the following error message:


Chrome Developer Tool:
"2017-06-07 15:17:24.400270 The following problem occurred: HTTP request failed404,Not Found,{"error":{"code":"005056A509B11EE1B9A8FEC11C21578E","message":{"lang":"de","value":"Ungültiger Funktionsimportparameter"},"innererror":{"transactionid":"AB0A07644B8111E7FFFFFFFF802E9F6D","timestamp":"20170607131727.0622840","Error_Resolution":{"SAP_Transaction":"Run transaction /IWFND/ERROR_LOG on SAP Gateway hub system (System Alias ) and search for entries with the timestamp above for more details","SAP_Note":"See SAP Note 1797736 for error analysis (https://service.sap.com/sap/support/notes/1797736)"}}}} -"
I can not find the error. Maybe someone has a solution. Many Thanks