Description
This error occurs when setting or modifying Summaries in the subnetwork definition. The data type for Summary Attribute in the Subnetline feature class is not compatible with the input values for the Function and Attribute parameters.
Refer to the Set Subnetwork Definition tool documentation, and review the table for the Summaries parameter.
Solution
Ensure that the Summaries parameter value is a data type that is compatible with the Function and Attribute parameter values specified.