[RobertCa]

The run that worked was just to try to see if the error could be cleared. With every plan in the project failing (including, briefly, a plan that didn’t have a multiple opening at all), I was worried the problem was deeper than just the one error.
Going forward, I’ll set the stag limits close to the edges of the culverts and move if computation errors occur to provide as much room for convergence, like you said.
As an aside, in this particular model, it will fail if opening #1 has any stag limits (upstream xs or downstream xs) projecting into any point of opening #2. It will run to completion, however, if the reverse occurs but with the error “Subroutine SNET_HDF_Q_DISTR” appearing.
Do you know what this new error means?

[RobertCa]

I adjusted the cross sections so that the skew angle of the culverts isn’t as extreme. Its not ideal because its not a realistic representation of the site but it ran after that.
That also doesn’t explain how the models ran just fine, even with the skew, in the past.

[RobertCa]

That’s what I thought was the issue as well.

However these plans ran smoothly before when I made them in 2016. Now when I open them and, without changing any settings, try to run a steady flow analysis, they stall out with that error.

I think I am just thinking about something wrongly because it still doesnt make sense.

This is what my culverts and stag limits look like.

[Author]

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