imports loaded in package.mo not found when trying to load a model

[martinscripts]

Description

This may be connected to #133.
I am trying to load a model which uses the dynawo library
There are several packages loaded inside the package.mo of dynawo:

encapsulated package Dynawo "Dynawo models library"
  // generic import commands
  import Complex "Complex numbers foundation class";
  import Modelica;
  import Modelica.ComplexMath "Complex numbers operators (+, - , *, exp, abs...)";
  import Modelica.Icons;
  import Dynawo;
  import Dynawo.AdditionalIcons;
  import Dynawo.Electrical.SystemBase;
  import Dynawo.Types "Standard Dynawo variable types";

which can't be found when loading a model through ModelicaSystem() in OMPython.

Maybe I am just missing something?

Thank you in advance :)

Steps to reproduce

from OMPython import ModelicaSystem
DYNAWO_PACKAGE_PATH = "[path-to-dynawo]/dynawo/sources/Models/Modelica/Dynawo/package.mo"
mod = ModelicaSystem(DYNAWO_PACKAGE_PATH, "Dynawo.Examples.SMIB.SMIBStepPm", ["Modelica"])

returns the error Error: Function ComplexMath.'abs' not found in scope GeneratorSynchronous.

Expected behavior

It should be loaded properly because ComplexMath is loaded in dynawo's package.mo, as pasted above.
And in OMEdit it runs.

writing mod = ModelicaSystem(DYNAWO_PACKAGE_PATH, "Dynawo.Examples.SMIB.SMIBStepPm", ["Modelica", "Modelica.ComplexMath"]) did not change it.

Version and OS

• Python Version 3.10.11
• OMPython Version 3.3.0
• OpenModelica Version 1.18.0
• OS: Windows 10, 64 bit

[adeas31]

This should work fine.
What happens if you run this script with omc.exe from the command line?

loadFile("[path-to-dynawo]/dynawo/sources/Models/Modelica/Dynawo/package.mo");
getErrorString();
simulate(Dynawo.Examples.SMIB.SMIBStepPm);
getErrorString();

[arun3688]

@martinscripts when i tried to load this model in OMEdit, i get the following error

[3] 15:54:14 Translation Error
[Dynawo.Electrical.Controls.Basics.SwitchOff: 19:3-19:48]: [Import Dynawo.NonElectrical.Logs.TimelineKeys not found in scope <top>.](omeditmessagesbrowser:///Dynawo.Electrical.Controls.Basics.SwitchOff?lineNumber=19)

[4] 15:54:14 Translation Error
[Dynawo.Electrical.Controls.Basics.SwitchOff.SwitchOffLine: 29:5-29:46]: [Variable TimelineKeys.LineOpen not found in scope SwitchOffLine.](omeditmessagesbrowser:///Dynawo.Electrical.Controls.Basics.SwitchOff.SwitchOffLine?lineNumber=29)

And i cannot find the model TimeLineKeys.mo in the package, could you please make sure the model TimeLineKeys.mo exists

[martinscripts]

@adeas31
running with omc.exe seems to work fine. I get a bunch of warnings but no error.

here the first part of the output:

Microsoft Windows [Version 10.0.19045.4046]
(c) Microsoft Corporation. Alle Rechte vorbehalten.

C:\Users\mfranke>"C:\OpenModelica\bin\omc.exe" "D:\User\mfranke\documents\projects\colib\src\GovCT2\run_model.mos"
true
"Notification: Automatically loaded package Modelica 3.2.3 due to uses annotation.
Notification: Automatically loaded package Complex 3.2.3 due to uses annotation.
Notification: Automatically loaded package ModelicaServices 3.2.3 due to uses annotation.
"
record SimulationResult
    resultFile = "C:/Users/mfranke/Dynawo.Examples.SMIB.SMIBStepPm_res.mat",
    simulationOptions = "startTime = 0.0, stopTime = 30.0, numberOfIntervals = 500, tolerance = 1e-06, method = 'dassl', fileNamePrefix = 'Dynawo.Examples.SMIB.SMIBStepPm', options = '', outputFormat = 'mat', variableFilter = '.*', cflags = '', simflags = '-initialStepSize=\\'0.001\\' -lv=\\'LOG_STATS\\' -nls=\\'kinsol\\' -s=\\'ida\\' -nlsLS=\\'klu\\' -maxIntegrationOrder=\\'2\\' -maxStepSize=\\'10\\' -emit_protected'",
    messages = "LOG_SUCCESS       | info    | The initialization finished successfully without homotopy method.
LOG_STATS         | info    | ### STATISTICS ###
|                 | |       | | timer
|                 | |       | | |    0.0050984s          reading init.xml
|                 | |       | | |    0.0007751s          reading info.xml
|                 | |       | | |    0.0010354s [  1.5%] pre-initialization
|                 | |       | | |    0.0004787s [  0.7%] initialization
|                 | |       | | |     2.66e-05s [  0.0%] steps
|                 | |       | | |     0.001309s [  1.9%] solver (excl. callbacks)
|                 | |       | | |    0.0058192s [  8.4%] creating output-file
|                 | |       | | |     3.15e-05s [  0.0%] event-handling
|                 | |       | | |    0.0010795s [  1.6%] overhead
|                 | |       | | |     0.059764s [ 85.9%] simulation
|                 | |       | | |    0.0695439s [100.0%] total
|                 | |       | | events
|                 | |       | | |     1 state events
|                 | |       | | |     0 time events
|                 | |       | | solver: ida
|                 | |       | | |   810 steps taken
|                 | |       | | |  1055 calls of functionODE
|                 | |       | | |    67 evaluations of jacobian
|                 | |       | | |    16 error test failures
|                 | |       | | |     0 convergence test failures
|                 | |       | | | 0.0119926s time of jacobian evaluation
LOG_SUCCESS       | info    | The simulation finished successfully.
",
    timeFrontend = 0.2678431,
    timeBackend = 0.2779029,
    timeSimCode = 0.0340495,
    timeTemplates = 0.0383436,
    timeCompile = 8.264896800000001,
    timeSimulation = 6.842613,
    timeTotal = 15.7369697
end SimulationResult;

[martinscripts]

@arun3688
sorry, I forgot. This is a problem on the dynawo side, I think. The timeline keys files are in the gitignore, so not in the repo, but they're necessary, at least on windows OS.

copy the attached files into the folder dynawo\dynawo\sources\Models\Modelica\Dynawo\NonElectrical\Logs in your local dynawo repo, then it should work.
colib-main-windows_files (1).zip
(uploading .mo files wasnt possible, so I had to upload them in a .zip)

[martinscripts]

Is there anything else I can supply in order to answer my question? :)

[adeas31]

I just talked with @arun3688 and he will try to investigate this further.

In the meantime can you try the latest version of OpenModelica. The version 1.18 is almost 2-3 yrs old. Also try updating the OMPython to the latest version as well.

[martinscripts]

Thank you. Unfortunately, the OM 1.18 is a dependency of Dynawo, the library I am using.

[arun3688]

@martinscripts I tested the library in OMPython after putting the missing files in dynawo\dynawo\sources\Models\Modelica\Dynawo\NonElectrical\Logs and it worked perfectly fine see below

Python 3.8.5 (default, Sep  3 2020, 21:29:08) [MSC v.1916 64 bit (AMD64)] :: Anaconda, Inc. on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> from OMPython import ModelicaSystem
>>> mod = ModelicaSystem("C:/OPENMODELICAGIT/dynawo/dynawo/sources/Models/Modelica/Dynawo/package.mo", "Dynawo.Examples.SMIB.SMIBStepPm", lmodel=["Modelica"])
>>> mod.simulate()
LOG_SUCCESS       | info    | The initialization finished successfully without homotopy method.
LOG_SUCCESS       | info    | The simulation finished successfully.

The Dynawo library works with recent OpenModelica version v1.23.0-dev-358-g07765ef93c-cmake , So i suggest you to download the latest OpenModelica version and also update the OMPython from pip and test it and it should work by default

[martinscripts]

Thanks so much for your help.

while it may work, the version it is a requirement for contributing to dynawo.
I will update OMPython and hope that it works. If not, I'll see how to deal with the OM version.

Cheers! :)
.Martin

[martinscripts]

Updating OMPython got me a step further. The problem that I described doesn't happen anymore. Thank you!

[martinscripts]

Hello again,

I ran into a similar problem again once I tried to load my own model (outside of Dynawo) with Dynawo as a dependency:

from OMPython import ModelicaSystem
MODEL_PACKAGE_PATH = "[path-to-own-project]/src/KundurTwoArea/package.mo"
DYNAWO_PACKAGE_PATH = "[path-to-dynawo]/dynawo/sources/Models/Modelica/Dynawo/package.mo"
mod = ModelicaSystem(MODEL_PACKAGE_PATH, "KundurTwoArea.Grid.LoadFlow", ["Modelica", DYNAWO_PACKAGE_PATH])

Is this correct calling of ModelicaSystem()?

Again, it does not find the following packages:

[[...]/src/KundurTwoArea/package.mo:21:3-21:24:writable] Error: Import Modelica.Icons not found in scope <top>.
[[...]/src/KundurTwoArea/package.mo:27:3-27:24:writable] Error: Base class Icons.Package not found in scope KundurTwoArea.
Error: Class KundurTwoArea.Grid.LoadFlow not found in scope <top>.

I want to try OMEdit 1.22.2, I installed it as a second instance alongside 1.18.0. (see here)
Is there a way to tell OMPython which version to use? (or to check which one it is using?)

Best regards,
.Martin

[adeas31]

I think OMPython uses the OPENMODELICAHOME environment variable. Set the variable to the version you want to use.

[martinscripts]

Ok, it is set to 1.22.2.
So with this version it does not work.

Any further ideas?
The imports still happen in the package.mo like above, but in my own model this time.
They don't seem to be found. Maybe I am missing something here 🙈 .