Francesco Casella

Issue with nominal, max and min attributes in generated code

4

@mahge, please compile the model ICT4CSE.Courseware.U04_CaseStudy_02.CompleteSystem in the package that I sent you by e-mail. Using 1.20.4 I get: ``` CompleteSystem_02nls.c:220:93: error: no member named 'nominal' in 'struct BOOLEAN_ATTRIBUTE' sysData->nominal[i]...

Wrong numerical Jacobian makes the simulation of Buildings.Airflow.Multizone.Examples.ClosedDoors very slow

5

The simulation of Buildings.Airflow.Multizone.Exmples.ClosedDoors is much slower than with other tools (e.g. OCT). The [simulation log](https://libraries.openmodelica.org/branches/master/Buildings_8/files/Buildings_8_Buildings.Airflow.Multizone.Examples.ClosedDoors.sim) ``` LOG_STATS | info | ### STATISTICS ### | | | | | timer...

Variables depending only on discrete-time variables and possibly on parameters should be computed efficiently

3

Variables that only depend on discrete-time variables and possibly on parameters change their values only at even times and are othewise constant. Therefore, they should only be computed during initialization...

simplifyInStream module performs incorrect transformations

15

Several models of the Buildings library fail because of division by zero, see e.g. [Buildings.Air.Systems.SingleZone.VAV.Examples.Guideline36](https://libraries.openmodelica.org/branches/master/Buildings_8/files/Buildings_8_Buildings.Air.Systems.SingleZone.VAV.Examples.Guideline36.sim). The simulation fails immediately after initialization with ``` division by zero at time 0, (a=0)...

OMC cannot initialize the Nordic44 models from OpenIPSL

7

OMC currently segfaults when solving the initial equations of [OpenIPSL.Examples.DAEMode.N44_Base_Case_Systems.Nordic44_Base_Case_StateEvents](https://libraries.openmodelica.org/branches/master/OpenIPSL/files/OpenIPSL_OpenIPSL.Examples.DAEMode.N44_Base_Case_Systems.Nordic44_Base_Case_StateEvents.sim) on Linux. With previous versions (e.g. 1.18.0), the same model [timed out](https://libraries.openmodelica.org/branches/v1.18/OpenIPSL/files/OpenIPSL_OpenIPSL.Examples.DAEMode.N44_Base_Case_Systems.Nordic44_Base_Case_StateEvents.sim), probably because the dense solver was still used....

Also convert URIs when running conversion scripts

2

See modelica/ModelicaSpecification#3199. @perost, are we doing that already?

The package manager should allow to uninstall old packages

2

Currently, it is only possible to install newer versions of packages, but it is not possible to get rid of old ones. This is not sustainable in the long run....

Linear solver failures in Buildings model because of bad tearing

3

### Description As reported by @mwetter, model [Buildings.ThermalZones.Detailed.Examples.MixedAirFreeResponse](https://libraries.openmodelica.org/branches/master/Buildings_latest/files/Buildings_latest_Buildings.ThermalZones.Detailed.Examples.MixedAirFreeResponse.sim) generates a lot of warnings about linear solver failures. @AnHeuermann could you please have a look and report?

TwoGeneratorsLocalInitialization model in PowerGrids fails at initialization

1

### Description The `PowerGrids.Examples.Tutorial.IslandOperation.TwoGeneratorsLocalInitialization` in PowerGrids 1.0.2 fails at initialization during the homotopy process while `lambda = 0`, using the 1.19.0-dev.beta5 version of OMC. This issue should be investigated and...

Variable not found during instantiation of an IDEAS model

4

Please check [IDEAS.LIDEAS.Validation.Case900ValidationLinear](https://libraries.openmodelica.org/branches/master/IDEAS/files/IDEAS_IDEAS.LIDEAS.Validation.Case900ValidationLinear.err). The following error is reported: ``` [/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0/LIDEAS/Components/LinRectangularZoneTemplate.mo:144:5-144:14:writable] Error: Variable fraB not found in scope LinRectangularZoneTemplate. ``` I understand the model otherwise works in Dymola, so it...