source: Innovyze Support Portal
A common model building task is importing CAD files into XPSWMM.
Import CAD files is a little different from importing other type of external files. It starts with loading the CAD file as a background.
Once the CAD file is loaded we can import the layer into the model.
It is common to have connectivity issues after the data is imported. As shown below, manually cleaning up might be needed to remove extra nodes to fix the connectivity.