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I came across a problem involving culverts, not sure if it has to do with a bug or an operation error on my part. When launching the simulation run, I keep getting an error stating “Could not open the file *.hy8”. The model was able to run successfully without the culvert in-place in a separate run. So I know it has to do with the culvert. I entered the culvert in the model by following the procedure as outlined in the manual: 1- First, specified the file location of the HY-8 model, under the edit tab /preferences. 2- Created the *.Hy8 file through the boundary condition coverage. 3- By activating the BC coverage, created two arcs, then right-clicked and selected “Assign Linear BC”. 4- Launched the HY-8 program to enter the culvert properties. 5- As an experiment, I also copied the HY-8 program and libraries into the same project folder, re-specified the pathway and tried to run the model again, but got the same error message. Any help or advice on this is greatly appreciated. Thanks!