Bugs go here: https://trac.openmodelica.org/OpenModelica/newticket

I created a new one: https://trac.openmodelica.org/OpenModelica/ticket/1827

The work-around is using any function that prints and returns a value.

model M

  function myPrint

    input String str;

    input String file := "";

    output Boolean ok;

  algorithm

    Modelica.Utilities.Streams.print(str, file);

    ok := true;

  end myPrint;

  Integer i;

protected

  Boolean dummy;

equation

  when sample(0,0.1) then

    dummy = myPrint("printing at time: " + String(time) + "\n");

    i = pre(i) + 1;

  end when;

end M;

Which gives you output:

printing at time: 0

printing at time: 0.1

printing at time: 0.2

printing at time: 0.3

printing at time: 0.4

printing at time: 0.5

printing at time: 0.6

printing at time: 0.7

printing at time: 0.8

printing at time: 0.9

printing at time: 1

I've Simulated your Modelica Code and cannot find any text messages.

Do I have to open any special output window? And if so where do I open it?  I haven't found any entries in the menu about any text output windows.

Or do I have to execute Open Modellica in the Windows Shell?

Yes, OMEdit sucks at displaying simulation output. Like "your model ended before the stop-time due to xyz". You can set the filename and read that if you prefer OMEdit over OMShell

Thank's so far for your answers. So what you're saying is: No way around Shell??? That  sucks.

I'm kind of new to OM so what do I enter in the OEMShell?

Well, you could always send Adeel a message complaining you don't get the output from the executable... Or adding a bug to trac.openmodelica.org.

OMShell works the same way as you do in OpenModelica scripting from command-line

loadModel(Modelica)

getErrorString()

loadFile("path/to/myFile.mo")

getErrorString()

simulate(myModelName, stopTime=0.10)

getErrorString()

Thank's a lot!!!

works since r13361