I just followed the procedure to create two additional fields on the Customer Data screen of the Business Partner transaction using the Easy Enhancement Workbench. There was already one field on this screen created by another developer.
When I generated my project, everything seemed to go OK - no errors in the log, table updated, data elements created, screens generated. However, when I looked at the customer data screen, the other developers screen element was still visible, but mine had not appeared.
Is there something else that I have to do to get my screen elements to appear also?