The integration of forms (and further active controls) into Web Dynpro ABAP popups is not supported.
It is not possible to display two or more InteractiveForm UI elements at the same time in a browser window.
Web Dynpro ABAP does not support interfaces that are compatible with Smart Forms.
If you used an existing form for the form integration, whose interface is not based on an XML schema, you cannot then add any further data fields.
If you integrate an existing form with an XML schema-based interface into your Web Dynpro application, ensure that all names of elements in the schema consist of capital letters.
If names of elements in the schema consist of lowercase letters, note that:
You cannot navigate to invalid entries on the form from the MessageArea element.
The application cannot place the focus on a field in the form.
The data type DECFLOAT is not presently supported by the integration of forms in Web Dynpro ABAP.
For further limitations, refer to SAP Note 1098009 .