Francesco Casella

Provide a bare-bones ModelicaUtilities.h file only providing the ModelicaUtilities function declarations

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In #3867 there was a discussion about whether ModelicaUtilities.h in the MSL was meant to be tool-specific, which ended up in the removal of that file from the MSL. If...

Questionable parametrization of V_pulse in Spice3 library leads to numerically unreliable computations

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While analyzing possible regressions from MSL 4.0.0 to 4.1.0 in OpenModelica, we found issues with several Spice3 model: ``` Modelica.Electrical.Spice3.Examples.Inverter Modelica.Electrical.Spice3.Examples.FourInverters Modelica.Electrical.Spice3.Examples.InvertersApartRecord Modelica.Electrical.Spice3.Examples.InvertersExtendedModel Modelica.Electrical.Spice3.Examples.Nor Modelica.Electrical.Spice3.Examples.Spice3BenchmarkFourBitBinaryAdder ``` all failing at the...

Modelica.Fluid.Sensors.BaseClasses.PartialFlowSensor currently contains these equations: https://github.com/modelica/ModelicaStandardLibrary/blob/ea28ae3e29bf0ed9c68189100292a0001151143e/Modelica/Fluid/Sensors.mo#L828-L835 In fact, it makes no sense to compute the inStream() quantities at port_a if allowFlowReversal = false, because they will never be used. In...

Clarifications in Section 3.7 and 5.6.1 regarding "builtin classes"

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[Section 3.7](https://specification.modelica.org/maint/3.6/operators-and-expressions.html#built-in-intrinsic-operators-with-function-syntax) is entitled "Built-in Intrinsic Operators with Function Syntax", but it actually describes both built-in operators and built-in functions, so the title could probably be made more accurate as...

Standardized way to select iteration variables and residuals

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Discussions about suggesting tearing variables in Modelica models have been carried out in the community around the late 2000's, in particular within the Modelica.Fluid group. Unfortunately, no consensus materialized back...

Strange regression involving Spice models in the MSL

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I am checking the regressions between [Modelica 4.0.0](https://libraries.openmodelica.org/branches/master/Modelica_4.0.0/Modelica_4.0.0.html) and [Modelica 4.1.0](https://libraries.openmodelica.org/branches/master/Modelica_4.1.0-beta.om/Modelica_4.1.0-beta.om.html). At the moment there are 7 regressions, of which 6 are in the Spice library: ``` Modelica.Electrical.Spice3.Examples.Inverter Modelica.Electrical.Spice3.Examples.FourInverters Modelica.Electrical.Spice3.Examples.InvertersApartRecord...

Buildings.Templates.Plants.Controls.StagingRotation.Validation.EquipmentEnable causes the runtime to crash due to buffer overflow

6

Please check [Buildings.Templates.Plants.Controls.StagingRotation.Validation.EquipmentEnable](https://libraries.openmodelica.org/branches/master/Buildings_latest/files/Buildings_latest_Buildings.Templates.Plants.Controls.StagingRotation.Validation.EquipmentEnable.sim) When running on the CI, the runtime just crashes after a few milliseconds without any error message reported on the simulation log. The compilation log contains these...

Crash due to large number of protected variables in algorithm

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@adeas31 reports that this model ```modelica model Test Modelica.Blocks.Sources.Sine sine(f = 10, amplitude = 1) annotation( Placement(transformation(origin = {-68, 6}, extent = {{-10, -10}, {10, 10}}))); Modelica.Blocks.Math.RealFFT realFFT(f_max = 50,...

Issues when flattening ScalableTestGrids models with -d=mergeComponents

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Please check ScalableTestGrids_NB_SymbolicJacobian_ScalableTestGrids.Models.Type1.Type1_N_1_M_1 with the new backend and -d=mergeComponents, see [report](https://libraries.openmodelica.org/branches/heavy_tests/ScalableTestGrids_NB_SymbolicJacobian/files/ScalableTestGrids_NB_SymbolicJacobian_ScalableTestGrids.Models.Type1.Type1_N_1_M_1.err). The frontend first complains that ``` [OMCompiler/Compiler/NFFrontEnd/NFExpression.mo:2283:11-2283:118:writable] Error: Internal error NFExpression.toAbsyn got unknown expression '({true, true})[]' [OMCompiler/Compiler/NFFrontEnd/NFExpression.mo:2283:11-2283:118:writable] Error: Internal...

Non-partial models which are not locally balanced should generate an error in the NF when checking and trying to simulate

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Consider the following MWE ``` model M Real x, y; equation x = 3; end M; ``` If I check the model, I get ``` [1] 11:31:10 Scripting Notification Check...