GMS User Posted March 1, 2012 Report Share Posted March 1, 2012 I buiil a steady state model. I run it and I get it to converge.I switch to transient, change the CHD boundary conditions and import heads from the steady state simulation.I run the model and everything is fine.When I try to change the boundary conditions (CHD) I get the model not to converge. In the iteration/error I get two very high values and then the simulation stops.I revert to previous values but the simulations fails again.The only way to get it fixed is to un-check all packages in modflow and re-map the coverages to modflow.After that the simulations converges.By the way I'm using GMS 8.0.Any other suggestions?Thanks Quote Link to comment Share on other sites More sharing options...
Alan Lemon Posted March 1, 2012 Report Share Posted March 1, 2012 It sounds like when you "remap to MODFLOW" that the CHD bcs are changed back to the original state and so now it converges?Which solver are you using? Do a bunch of cells go dry in the transient simulation? Maybe modflow gets some divide by 0 or something. Quote Link to comment Share on other sites More sharing options...
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