Oh and I should add that I specified a Normal Depth downstream boundary condition and set the friction slope to 0.04 and saved my flow data. This has not helped.
For some reason when I go back into the flow data boundary condition and click on normal depth again the 0.04 is gone and the box is blank . Is this normal or could it be the issue?
I have this project due in a few weeks and this is presenting a complete block for me. I have been trying different files and using a basic token geometry but same problem occurring.
Any checks I should do or other advice would be greatly appreciated.