Straight feature not generating stock part occurrence.
A straight feature should always generate a stock part occurrence.
The Route solver may not have completed all the processing due to other problems.
The run is invalid because a straight feature does not have a stock part occurrence. This situation may impact Reports.
What You Should Do
This situation can be a side effect of 'close' features having problems (ToDoRecords).
Check the To Do List for nearby features in error, and fix the problems.