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fmiSetReal not called

#8857  Permalink Top

fmiSetReal not called

Jan-01-19 20:09:38

Hello everyone,

i tried to build my own FMU (FMI1.0, Co-Simulation with a DLL). Initialization, Steps (fmiDoStep) and Output (fmiGetReal) etc. is working fine.

But: I get no input into my FMU. I debugged my DLL - and fmiSetReal seems to be never called from OM.

I'm using OM 1.13.0 64bit (Windows version)

My fmiSetReal is like this:
fmiStatus fmiSetReal(fmiComponent c, const fmiValueReference vr[], size_t nvr, const fmiReal value[])
{
...
}

and function signature (like the other fmi-functions):
#define DllExport __declspec( dllexport )
DllExport fmiStatus fmiSetReal    (fmiComponent c, const fmiValueReference vr[], size_t nvr, const fmiReal    value[]);

I have also looked into my compiled DLL with "Dependency Walker": fmiSetReal-function is there.

In OM, the input connector is also available and in XML-file it looks like this:
  <ScalarVariable name="inp1" valueReference="1" description="Inp1" variability="continuous" causality = "input" alias="noAlias">
     <Real start="0"/>
  </ScalarVariable>

I have tried with several options (with/without variability; with/without alias; with/without fixed) but same results.

Thanks in advance for your help!

Greetings,
Robert

#8858  Permalink Top

Re: fmiSetReal not called

Jan-01-19 21:27:18

From the used models:

class Test
  Modelica.Blocks.Sources.Sine sine1 annotation(
    Placement(visible = true, transformation(origin = {-70, 30}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
  inc_cs_st_FMU inc_cs_st_FMU1(startTime = 0, stopTime = 10)  annotation(
    Placement(visible = true, transformation(origin = {-30, 32}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
equation
  connect(sine1.y, inc_cs_st_FMU1.inp1) annotation(
    Line(points = {{-58, 30}, {-40, 30}, {-40, 40}, {-42, 40}}, color = {0, 0, 127}));
  annotation(
    uses(Modelica(version = "3.2.2")));
end Test;

From the FMU:
[...]
equation
  {out1} = fmi1Functions.fmi1GetReal(fmi1cs, {0.0}, flowInitialized);
  {fmi_input_inp1} = fmi1Functions.fmi1SetReal(fmi1cs, {1.0}, {inp1});
  flowStep = fmi1Functions.fmi1DoStep(fmi1cs, time, communicationStepSize, true, flowInitialized);
[...]

#8868  Permalink Top

Re: fmiSetReal not called

Jan-07-19 12:37:20

Update: fmiSetReal in OMEdit is called (seen in Algorithmic Debugger), also the C-function is created. But the C-code is very hard to debug in detail because it's generated code.

Is there any possibility to run a C-code debugger in a graphical user interface to trace the problem? I have tried to compile with Visual Studio (easy to debug!) but get errors, only the shipped GCC/MINGW seems to run correctly.

I have seen further the fmisetReal-function is not called directly from my FMU-DLL: It's onyl a call for a wrapper in fmilib(.a). Now, i think the error must be there (fmilib.a).

OM is great, but a hard piece of work to get co-simulation running.current/sad

Thx!

Greetings,
Robert

#10486  Permalink Top

Re: fmiSetReal not called

Feb-01-21 18:20:36

Did you finally find a way to resolve this?
Could it be caused by this function having an empty body:
  https://github.com/OpenModelica/OpenMod … .cpp#L1245
??

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