SAP Message REMPT355 - Function not possible for newly created planned order

Diagnosis
The function you choose is not allowed for the planned order. Theplanned order you selected was only created by you in this session.

System Response
The system cannot carry out the function you selected for a newlycreated planned order.

Procedure
FIrst save the planning table and then carry out the function for theplanned orders or carry out the function for another planned order.