Removing authorization for a transaction, except if called from a workitem.

[de Valensart Schoenmaeckers, Patrick]

Hi workflowers!
 
Does anyone know how to restrict the access to a SAP R/3 transaction in a
way that it can only be called from a workitem?
 
We have a workflow for PR release, where at some stage an user gets the
opportunity to change the PR by executing a workitem which calls the
following method :
 
begin_method changeindialog changing container.
  set parameter id 'BAN' field object-key-number.
  call transaction 'ME52' and skip first screen.
end_method.
 
I would like to remove authorizations for that transaction ME22 from user
profiles, except if it is called from a workitem. To do that, I want to
avoid copying an existing standard SAP Program... Has anyone done this
before?
 
Thanks in advance for your answers.
 
Patrick de Valensart
Associate IS Analyst
NV Philip Morris Belgium SA
Boulevard du Souverain, 24
B-1170 Brussels