Diagnosis
The name that you entered is that of a type defined in the ABAPDictionary (for example, that of a table field).

System Response
The system allows you to define the element with reference to the ABAPDictionary type. Alternatively, you can still define it as an ordinaryprogram field. If you create the link to the ABAP Dictionary, theattributes defined in the Dictionary definition (format, length, plusany text and search helps), are adopted by the screen element and usedat runtime. If you do not use an ABAP Dictionary reference, you mustdefine all of these attributes yourself.

Procedure
Choose "Yes" if you want to use an ABAP Dictionary reference, or "No"to create a normal program field. If you choose "Cancel", the name ofthe element remains unchanged.