000832: Invalid number of fields for a line event.
A line event defines a portion of a route using a from and to measure value. Therefore, line events require two measure fields. This error is presented if anything other than two measure fields has been specified. Point events require only one measure field.
Ensure two measure fields are specified for line event properties. See Linear Referencing toolbox for links to the help for the specific linear referencing geoprocessing tool.