Deployment Agent problem after upgrade to 4.5.3

System

Hi all.

I'm in the process of testing the upgrade from 4.01 to 4.5.3, and I've run into problems with Deployment Agent.

For short, after the migration (which did not generate any errors), all schedules (meaning the ones that existed in 4.01 and new ones created after the upgrade) fail with errors like this:

Error generating derivatives for schedule "name_of_schedule". Item cannot be found in the collection corresponding to the requested name or ordinal.

Has anyone else had this? What did you do to solve it?
Note for IW people: case already open (#1235411)

Thanks...