When importing elements with ModelBuilder the following is displayed in the Statistics tab:
"### Pipe(s) could not be created due to missing topology."
The following is also displayed in the Message tab:
"Error: Unable to create Conduit <Conduit_Name> start and/or stop node could not be found. Ensure that either the start or stop fields have been mapped..." and my conduits are not created.
In step 2 of modelbuilder make sure that you have the, "Establish connectivity using spatial data" option is checked. The default tolerance is 1 ft., but can be made larger if needed. A larger tolerance might be needed if the GIS data was not created using the snapping option which ensures all the lines and points are linked together. You might also want to check to the "Create nodes if none found at endpoints" option if it is applicable to what you would like to do.
Building and updating a model using ModelBuilder
Importing A CAD (eg. DXF or DGN) Drawing Using ModelBuilder [TN]