Diagnosis
Interface IF_RMPS_CASE is not implemented by the backend of theservice provider.

System Response
The selected function cannot be executed.

Procedure for System Administration
RESET N1
Find out which element type the case belongs to where the functionshould be executed (activity "Information" on case).
Search for this element type in Records Management Registry(transaction SRMREGEDIT)
Open the service provider which the element type belongs to and switchto tab page Class Roles.
Find out which class theIS_SP_CONTENT_CONNECTION_CLASS class role fulfils.
Check whether this class fulfils interface IF_RMPS_CASE.Replace this class with a suitable class.