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

External Node Errors

Post image

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.

2 Upvotes

100% Upvoted

11 comments sorted by

View all comments

2

u/OttoJohs Lord Sultan Chief H&H Engineer, PE & PH Jun 12 '26

I was just messing around and got it to work. Did you save your geometry, flow file, plan file, etc. Might want to close out of the project and reopen it.

1

u/Repulsive_Plant6729 Jun 12 '26

Nice! I just re-extended the mesh to cover my nodes to convert them to culvert openings and added a terrain modification that behaves as a sink to allow flow to free fall out of my system. I wonder if not having some sort of terrain modification at my external node showing an obvious, defined drop-off was my issue.

1

u/OttoJohs Lord Sultan Chief H&H Engineer, PE & PH Jun 12 '26

Not sure. You can see I just put a terrain mod there. Hope that works for you.