SAP Note 28230 - Data of the capacity splits disappears

Symptom:

When you maintain a production order, you execute capacity splits for an operation. If you exit the corresponding detail screen with "Back" and call it again later, the data entered has disappeared.

Cause and prerequisites

When you create a production order, one of the key fields of the capacity requirements records is not yet filled. As a result, the splits are no longer found during a second call.

Solution
Make the following program correction