OMPython is not reading simflags correctly

[Christian Kral <dr.christian.kral@…>]

I am using OMPython to automatically simulate and evaluate simulation models with OpenModelica. One of the new models IMC_YD is now included in the MSL but only simulates if I use the Newton solver for nonlinear equations in OpenModelica. I thus included

__OpenModelica_simulationFlags(jacobian = "", nls = "newton", 
  s = "dassl", lv = "LOG_STATS")

in the annotation of the model. So when I simulate the model in OMEdit, it works OK with no issues.

If I instead use OMPython to run the model, it hangs -- which I suspect is for the reason of that the __OpenModelica annoation is not evaluated correctly.

from OMPython import *
omc = OMCSessionZMQ()
omc.sendExpression("loadModel(Modelica,{\"trunk\"})")
omc.sendExpression("loadFile(\"/.../IMC_YD.mo\")")
omc.sendExpression("instantiateModel(IMC_YD)")
omc.sendExpression("simulate(IMC_YD, NumberOfIntervals=25000)")

I do not expect OMPython needs the simflags passed separately, since all other annotations (StopTime, etc.) are evaulated correctly, too.

Even if I wanted to pass the OM simflags to the simulation process I would not understand how the syntax really is...

[Christian Kral <dr.christian.kral@…>]

New MSL model with OpenModelica annotation

[dr.christian.kral@…]

Just a marginal comment, not related with the issue: I removed the annotation from the MSL according to ​https://github.com/modelica/Modelica/issues/2332 but I keep it in my user specific copy of the MSL I am working with...

[Martin Sjölund]

This is an OMEdit-specific flag as far as I can tell. And other OM clients need to input such settings manually. @Adeel: is this correct? Are these flags only simflags? If so we could create a convenience API for getting a string that is possible to pass as simulation flags as well as automatically passing this via the simulate() API.

[Adeel Asghar]

Yes its the simflags.

OMEdit basically reads them via getAnnotationNamedModifiers and getAnnotationModifierValue and pass them directly to the simulation executable as command line arguments.

[Francesco Casella]

Rescheduled to 1.14.0 after 1.13.0 releasee

[Francesco Casella]

Releasing 1.14.0 which is stable and has many improvements w.r.t. 1.13.2. This issue is rescheduled to 1.16.0

[Francesco Casella]

Retargeted to 1.17.0 after 1.16.0 release

[Francesco Casella]

Retargeted to 1.18.0 because of 1.17.0 timed release.

[Francesco Casella]

Ticket retargeted after milestone closed