Francesco Casella

Please try to compile [PowerGrids.Examples.Tutorial.IslandOperation.TwoGeneratorsFixedFrequencyReference](https://libraries.openmodelica.org/branches/newInst-newBackend/PowerGrids/files/PowerGrids_PowerGrids.Examples.Tutorial.IslandOperation.TwoGeneratorsFixedFrequencyReference.err) with the NB. The following error is issued: ``` Error: Template error: A template call failed (/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelica/OMCompiler/build/bin/../lib/x86_64-linux-gnu/omc/libOpenModelicaCompiler.so: (null)). One possible reason could be that a...

Please run [PowerGrids.Examples.Tutorial.GridOperation.Static.PowerFlow](https://libraries.openmodelica.org/branches/newInst-newBackend/PowerGrids/files/PowerGrids_PowerGrids.Examples.Tutorial.GridOperation.Static.PowerFlow.err) with the NB. The following error is generated: ``` /usr/bin/ld: PowerGrids_PowerGrids.Examples.Tutorial.GridOperation.Static.PowerFlow_09alg.o: in function `PowerGrids_PowerGrids_Examples_Tutorial_GridOperation_Static_PowerFlow_functionAlgebraics': PowerGrids_PowerGrids.Examples.Tutorial.GridOperation.Static.PowerFlow_09alg.c:(.text+0x3f): undefined reference to `PowerGrids_PowerGrids_Examples_Tutorial_GridOperation_Static_PowerFlow_eqFunction_306' /usr/bin/ld: PowerGrids_PowerGrids.Examples.Tutorial.GridOperation.Static.PowerFlow_09alg.c:(.text+0x54): undefined reference to `PowerGrids_PowerGrids_Examples_Tutorial_GridOperation_Static_PowerFlow_eqFunction_305' /usr/bin/ld: PowerGrids_PowerGrids.Examples.Tutorial.GridOperation.Static.PowerFlow_09alg.c:(.text+0x69):...

Please check [PowerGrids.Electrical.Test.TwoBusesResistiveTransmissionLineFault](https://libraries.openmodelica.org/branches/newInst-newBackend/PowerGrids/files/PowerGrids_PowerGrids.Electrical.Test.TwoBusesResistiveTransmissionLineFault.err). The NB fails with ``` Error: Internal error NBResolveSingularities.noIndexReduction failed. (2|2) Unmatched Variables *************************** [ALGB] (1) Real transmissionLine.busFault.port.I = Modelica.ComplexMath.'abs'(transmissionLine.busFault.port.i) (start = transmissionLine.busFault.port.IStart, nominal = transmissionLine.busFault.port.IBase) slice:...

Please check [PowerGrids.Electrical.Test.TestTapChangerLogicMax](https://libraries.openmodelica.org/branches/newInst-newBackend/PowerGrids/files/PowerGrids_PowerGrids.Electrical.Test.TestTapChangerLogicMax.err). The NB fails with ``` Error: Internal error NSimVar.SimVars.splitByType failed because of unhandled Variable state. ``` Why isn't `state` handled by the NB?

Please check [PowerGrids.Electrical.Test.TestOneBusTransmissionLineWithBreakersOneLoad](https://libraries.openmodelica.org/branches/newInst-newBackend/PowerGrids/files/PowerGrids_PowerGrids.Electrical.Test.TestOneBusTransmissionLineWithBreakersOneLoad.err). The NB fails with ``` Error: Internal error NBResolveSingularities.noIndexReduction failed. (1|1) Unmatched Variables *************************** [DISC] (1) enumeration transmissionLine.BreakersState(AcBc, AcBo, AoBc, AoBo) transmissionLine.breakerStatus (start = transmissionLine.BreakersState.AcBc) slice: {}...

Please check the compilation report of [PowerGrids.Controls.Test.TestRampTrackingFilter](https://libraries.openmodelica.org/branches/newInst-newBackend/PowerGrids/files/PowerGrids_PowerGrids.Controls.Test.TestRampTrackingFilter.err). The following errors are reported: ``` Reading outside of array row_match[809]=32759, n=768, m=768 Reading outside of array row_match[859]=32759, n=768, m=768 Reading outside of...

Please check [PowerGrids.Controls.Test.TestLeadLagWithNonWindupLimiter](https://libraries.openmodelica.org/branches/newInst-newBackend/PowerGrids/files/PowerGrids_PowerGrids.Controls.Test.TestLeadLagWithNonWindupLimiter.err). The NB says: ``` Warning: NBResolveSingularities.balanceInitialization reports an overdetermined initialization! Checking for consistency is not yet supported, following equations had to be removed: [TUPL] (4) ($FUN_1, $FUN_2,...

Follow-up of #4408, we should allow to also redeclare top-level replaceable stuff, as long as it makes sense.

Improve the logic of -abortSlowSimulation

8

As reported in #11010, some simulations in the Buildings library, e.g. `Buildings.Fluid.DXSystems.Cooling.AirSource.Examples.SpaceCooling`, run successfully, but fail when [`-abortSlowSimulation`](https://openmodelica.org/doc/OpenModelicaUsersGuide/latest/simulationflags.html#simflag-abortslowsimulation) is turned on, which is done by default by our CI testing...

Improve the logic to select initial guesses in the hybrid solver

6

In #11010, an interesting case is [discussed](https://github.com/OpenModelica/OpenModelica/issues/11010#issuecomment-2035855308) where the hybrid solver needs to handle a nonlinear system with initial guesses that are not good enough. In particular, there is one...