Hi Alessandro
After further investigating, I think the issue may be due to incorrect configuration of the connection settings.
IMG -> Common Component Settings -> Integration Framework -> Maintain Connection Settings
Now I am able to set up the AUTH integration sub-scenario by following note 1654282.
The note however, does not indicate how to configure the legacy connector for the PROV scenario.
There error seems to disappear when I mess around with this setting for a request in the work inbox however does not provision.
If you go into the PROV sub scenario, and then into Scenario-Connection type link you see that there is no connection type for FILE available. Further, if you go to SE24 for the list of classes it looks like there is only FILE classes for the AUTH scenario and SUPMG relating to CL_GRAC_AD*_FILE*
How do you configure PROV scenario for legacy connector? I can't see a way to do this?