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The Make Route Event Layer tool creates a temporary route event feature layer using an input of a route feature class. In some instances, the following generic error is returned when setting the feature class input in the Make Route Event Layer tool window.
Error: Invalid feature class type
This issue occurs when a line feature layer is used as input for the Make Route Event Layer tool, and M-values are not enabled. The line feature layer input does not have the capability to store route data. A feature layer can only support route data when the feature class is M-enabled.
Follow the instructions below to create an M-enabled feature class before using the feature class as the input layer in the Make Route Event Layer tool.
Note: The Make Route Event Layer tool requires a route feature class with M-values. For more information, refer to the following Esri technical article, KB# 000013763 - Problem: Empty output is returned by the Make Route Event Layer tool.