Hello,
we want to add a planning item as Work Task in project deliverables (Engineering-->Project Deliverables-->Plan and Execute-->Project Deliverables Navigator-->Project Deliverables Design). It is not possible as you can see in the following screenshot:

We are able to add the other executions types without any problems.
We added and checked the Basic Data for Work Task and Work orders without any success.
Could somebody get us a hint why this is not possible in this installation? (Parameter, Basic Data, Permissions…)
Thank you in advance!
Robert