Diagnosis
The following situations could result in the ABAP coding not beinggenerated:
1. System error in generating
2. Another user or transaction is generating (source code is blocked).

System Response
ABAP coding will not be regenerated for display variants. Customizingchanges will however be saved.

Procedure
Carry out the generating later.
The ABAP coding can be recreated in the initial screen for Customizingtransactions via Environment - Generate.