003124: The polyline representing shape_id <value> has 0 length. This shape_id will not be included in the output shapes.txt file, and the shape_dist_traveled value for all stops associated with this shape_id in the output stop_times.txt file will be 0.

Description

This indicates a geometry error in the input shape polyline.

Solution

Examine the problematic shapes in your input data and use the editing tools to update the shapes. Refer to the usage notes for the Generate Shapes Features From GTFS tool for editing tips.