Diagnosis
You changed or created a JIT delivery schedule for item &V1& in adelivery schedule with an external service agent, without filling thethe JIT delivery schedule horizon. This is a mandatory field.
For a delivery schedule with an external service agent, the JITdelivery schedule horizon cannot be seen on the scheduling screen, butonly on the delivery schedule header.

System Response
The system does not allow you to save a delivery schedule with JITdelivery schedules or a JIT delivery schedule horizon to avoid unwantedeffects on requirements.

Procedure
Branch to the delivery schedule header for the JIT delivery schedulefor item &V1&. Create the JIT delivery schedule horizon.
It is now possible to save the delivery schedule.