SAP Message /SAPCND/GENERATOR031 - Reading structure &1 has failed

Diagnosis
Reading of structure &v1& failed. This can happen when there is noactive version of the structure in the DDIC.

System Response
The requested action cannot be executed.

Procedure
Contact your system administrator.

Procedure for System Administration
This error has probably been transferred from another problem. Checkwhether further error messages exist in the log for the currentmessage.
If so, remove the cause of these problems first and then restartgeneration.
If no further messages exist, contact your responsible supportorganization.