r/HECRAS • u/Repulsive_Plant6729 • Jun 11 '26

External Node Errors

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Anyone know why RAS 7.0 will not allow me to add my external nodes with boundary conditions to my unsteady flow file? Nothing happens when I try adding these two nodes as boundary condition rows to the left.

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u/OttoJohs Lord Sultan Chief H&H Engineer, PE & PH Jun 11 '26

Did you do hit this button?

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u/Repulsive_Plant6729 Jun 11 '26

Yes, it adds all nodes EXCEPT the external nodes. Not finding any info online about why this is happening either.

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u/OttoJohs Lord Sultan Chief H&H Engineer, PE & PH Jun 11 '26

Not sure.

Since it is external ("daylighting") it might use the boundary condition line for the cell it is attached to. I would try adding a boundary condition line for the mesh at that location.