Description
A MEASURE_DIRECTION was chosen as the Calibration Method, but there were invalid measure values on some of the polylines in the input polyline feature class. As a result, the Calibration Method was changed to DIGITIZED_DIRECTION for those polylines.
Solution
Examine the log returned with the execution of the tool, and identify which polylines have the issue. Edit the vertices of those polylines and make sure they have proper measures.