I have this model:

model myModel

equation 

  when initial() then

    Modelica.Utilities.Streams.print("hello");

  end when;

end myModel;

If I simulate this with OpenModelica 1.9.0 Beta2 in OMShell I get this:

OMShell 1.1 Copyright Open Source Modelica Consortium (OSMC) 2002-2012
Distributed under OMSC-PL and GPL, see www.openmodelica.org

Connected to OpenModelica 1.9.0 Beta2 (r13495)
To get help on using OMShell and OpenModelica, type "help()" and press enter.

>> clear(); loadModel(Modelica,{"3.2.1"}); cd("C:/test"); loadFile("myModel.mo"); simulate(myModel)
true
true
"C:/test"
true
record SimulationResult
    resultFile = "C:/test/myModel_res.mat",
    simulationOptions = "startTime = 0.0, stopTime = 1.0, numberOfIntervals = 500, tolerance = 1e-06, method = 'dassl', fileNamePrefix = 'myModel', storeInTemp = false, noClean = false, options = '', outputFormat = 'mat', variableFilter = '.*', measureTime = false, cflags = '', simflags = ''",
    messages = "hellohello",
    timeFrontend = 0.48506047147699,
    timeBackend = 0.00381008109982807,
    timeSimCode = 0.0024721147429428,
    timeTemplates = 0.0157765793427199,
    timeCompile = 1.36685796517343,
    timeSimulation = 0.0236075452097846,
    timeTotal = 1.89762297291522
end SimulationResult;


As you can see the string "hello" was printed twice.

And this is my problem. I used the when initial() section for initialization of 3D tables very similar to the combiTable models in the MSL. And this causes an error because I need to initialize each table once and only once.

I tested the same code in Dymola 2013 FD01 and a similar code in OpenModelica 1.8.1. Both do the when initial() section only once.

Is something wrong in OpenModelica 1.9.0 Beta2 ?