Diagnosis
It is specified that the ABAP application class is not to be generated.In this case the specified class has to be a subclass of standard classCL_UPWB_BSP_APPL. The specified class &V1& is not asubclass or is not active.

System Response
If the BSP application is generated in the Web Interface Builder,generation may fail. If generation is successful and you start theWeb application, an error may occur if the BSP page does not correspondto the data that delivers the class.

Procedure
Use the standard class or a subclass of standard class CL_UPWB_BSP_
APPL, or set the "Generate class" setting to true.
If the specified class has been generated by the Web Interface Builderbefore, also set the "Generate class" setting to true. Then youwill be asked explicitely before each generation whether your classshould be overwritten.
You will find more information in the F1 documentation on the "Generateclass" setting.