When running Modelbuilder to import data into an existing model, the following error is seen:
"Some current pipes in the model are missing endnodes. Use Network Navigator to locate pipes and assign stop and start nodes before running Modelbuilder."
This error is seen when there are pipes in the model which are missing start and end nodes / junctions. These pipes may be duplicate due to incorrect source data and imported during Modelbuilder process.
To find pipes without end nodes using Network Navigator:
This should populate the pipes which are missing end nodes and might be missing end nodes. If for some reason Navigator doesn’t populate these pipes which are missing end nodes then,
However, to avoid this, you should use the establish pipe connectivity feature of Modelbuilder . You can choose to have a node created when there isn't one found at a pipe endpoint. You can also have pipe end points connect to nodes that are within a distance/tolerance you define.
Using Network Navigator
Using ModelBuilder to Import External Data