Field help (NEXOPENUM)

The next operation is used to link the routing operation in a logical order for the operational process.
This operation does not necessarily start at the end of the previous operation in the operational process as the scheduling describes the sequencing mode of the operations.

The next operation must be different from the processed operation, and must be part of the operations of the processed routing.
The last operation in the routing must have available a next operation set to zero.