There are shipments without stages and points

What causes this issue?

There are shipments in the current transportation network with neither
shipment stages nor points. No information on these shipments can be
displayed. This does not apply to any other shipments.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Specify stages and points for the stages and points and call the
transportation info again.

Error message extract from SAP system. Copyright SAP SE.