Francesco Casella

Barring boundary conditions that impose constraints on differentiated variables (which is the case of the BenchmarkCammarata model), the flat SOFC model has been successfully exported to Pyomo.DAE, where it was...

@kabdelhak, can you run [EHPTexamples.EV.FirstEV](https://libraries.openmodelica.org/branches/newInst-newBackend/EHPTexamples/files/EHPTexamples_EHPTexamples.EV.FirstEV.err) after your fixes?

Of course it is, that's a 1D mechanical system :)

Maybe also the BenchmarkCammarataIndex1 is actually index-2. I'll check with Dymola ASAP.

I just ran the BenchmarkCammarataIndex1 model with Dymola, turning on the logging of equation differentiation for index reduction and I saw none. Seems really an index-1 system. Can I get...

@kabdelhak, you suggested me to use the old backend and `-d=bltdump` to check for the system index, but I am getting inconclusive results. In fact, I'm not getting any specific...

> @casella and regarding your original question regarding a way to check if it is index-2 or higher: i don't know of a way to check if trivial state equalities...

Catching up on this topic again. I just successfully ran `SOFCPoliMi.Tests.BenchmarkCammarataIndex1` with the OB and the flags `--preOptModules-=removeSimpleEquations -d=bltdump` but I got **no report of index reduction**, as I instead...

I also observed that there are some similarities in the way the index-2 and index-1 models fail: ### Index 2: BenchmarkCammarata ``` Error: Internal error NBResolveSingularities.noIndexReduction failed. (8|16) Unmatched Variables...

Since in both cases we have some evidence of issue with the concLosses component, we tried to test that component standalone: ```modelica model Test SOFCPoliMi.Components.FuelCell.DiffusionLosses.DiffusivityCoefficients diff( pAnode = 30e5+time, pCathode...