2D Solution went unstable twice

[bcahill]

Has anyone ever had a 1D/2D model run for a long period of time and then suddenly go unstable without any results being written to the 1D *.O## output files? The *.hdf file for the associate plan contains data just prior to it going unstable. In my case the model simply says that the 2D Solution went unstable at 27MAR2010 02:23:58 but it also says that the simulation went unstable at 11MAR2010 23:58:39 which is during the warmup period. How can a model go unstable in the warmup period and still continue to process only to go unstable again?

Aside from the sudden instability the model was running rather stable.

[Anonymous]

I have a same problem

[aguiheux]

Hi all,

Same problem here as well. And the funny part is that i don’t even have a warmup period now (i’ve removed it since it seems to compute without it)..

I really don’t know how it’s possible. Any clue?

[Ian Sharp]

I have had this too. 1D/2D connections are notorious for this. There is a problem somewhere in your model but it is hard to find with these vague errors.

[aguiheux]

Thanks for the reply. That’s what i thought, but not easy to detect indeed. I have more than 50 1D/2D connections, so it will be hard to desactivate them one by one, but i don’t think i have another option.

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