Simulation crash with optimization solver

[cryogenium@…]

Compilation was successfull, simulation gets next horror:

/tmp/OpenModelica_mikko/OMEdit/Modelicatesti -port=42296 -logFormat=xmltcp -override=startTime=0,stopTime=30,stepSize=0.06,tolerance=1e-06,solver=optimization,outputFormat=mat,variableFilter=.* -r=Modelicatesti_res.mat -w -lv=LOG_STATS

* Error in `/tmp/OpenModelica_mikko/OMEdit/Modelicatesti': double free or corruption (!prev): 0x081e8798 *

======= Backtrace: =========
/lib/i386-linux-gnu/libc.so.6(+0x67377)[0xb6dde377]
/lib/i386-linux-gnu/libc.so.6(+0x6d2f7)[0xb6de42f7]
/lib/i386-linux-gnu/libc.so.6(+0x6dc31)[0xb6de4c31]
/usr/lib/i686-linux-gnu/omc/libSimulationRuntimeC.so(+0x94290)[0xb773a290]
/usr/lib/i686-linux-gnu/omc/libSimulationRuntimeC.so(pickUpModelData+0x9d6)[0xb7738fb6]

[Martin Sjölund]

You need to attach the model and settings to the ticket so we can test it. It seems the crash is in the optimizer and you are running 32-bit Ubuntu, but that is all we can tell...

[cryogenium@…]

My computer is i386, old but it's reserved for my test projects.
I'm sorry, I don't remember settings more than original post can tell. But there is the code what I tried to run. Very simple test but something went wrong. It's also possible that my computer/operating system was broken, I reinstalled it, used OM version "stable" and made similar model with OMEdit. It worked ok but this model crash..

/tmp/OpenModelica_mikko/OMEdit/Modelicatesti -port=44236 -logFormat=xmltcp -override=startTime=0,stopTime=30,stepSize=0.06,tolerance=1e-6,solver=optimization,outputFormat=mat,variableFilter=.* -r=Modelicatesti_res.mat -w -lv=LOG_STATS

model Modelicatesti
  Modelica.Blocks.Sources.Step step1(startTime = 5)  annotation(
    Placement(visible = true, transformation(origin = {-72, 6}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
  Modelica.Blocks.Continuous.PID PID(Ti = 10, k = 7)  annotation(
    Placement(visible = true, transformation(origin = {2, 6}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
  Modelica.Blocks.Continuous.FirstOrder firstOrder1(k = 1)  annotation(
    Placement(visible = true, transformation(origin = {40, 6}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
  Modelica.Blocks.Math.Feedback feedback1 annotation(
    Placement(visible = true, transformation(origin = {-38, 6}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
equation
  connect(firstOrder1.y, feedback1.u2) annotation(
    Line(points = {{52, 6}, {68, 6}, {68, -34}, {-38, -34}, {-38, -2}, {-38, -2}}, color = {0, 0, 127}));
  connect(firstOrder1.u, PID.y) annotation(
    Line(points = {{28, 6}, {12, 6}, {12, 6}, {14, 6}}, color = {0, 0, 127}));
  connect(PID.u, feedback1.y) annotation(
    Line(points = {{-10, 6}, {-30, 6}, {-30, 6}, {-28, 6}}, color = {0, 0, 127}));
  connect(feedback1.u1, step1.y) annotation(
    Line(points = {{-46, 6}, {-62, 6}, {-62, 6}, {-60, 6}}, color = {0, 0, 127}));
  annotation(
    uses(Modelica(version = "3.2.2")));
end Modelicatesti;

Result:

* Error in `/tmp/OpenModelica_mikko/OMEdit/Modelicatesti': double free or corruption (!prev): 0x098c6798 *

======= Backtrace: =========

/lib/i386-linux-gnu/libc.so.6(+0x67377)[0xb6dcd377]

/lib/i386-linux-gnu/libc.so.6(+0x6d2f7)[0xb6dd32f7]

/lib/i386-linux-gnu/libc.so.6(+0x6dc31)[0xb6dd3c31]

/usr/lib/i686-linux-gnu/omc/libSimulationRuntimeC.so(+0x94290)[0xb7762290]

/usr/lib/i686-linux-gnu/omc/libSimulationRuntimeC.so(pickUpModelData+0x9d6)[0xb7760fb6]

Maybe this help a little bit more? (Or not..)

[cryogenium@…]

And when I tested this code, it also started to crash model which was ok..

[Martin Sjölund]

I can confirm it crashes on my machine as well, when using the optimization solver. valgrind --tool=memcheck also reports errors. I'll have a look later.

[Martin Sjölund]

Fixed (added an error message saying -g=Optimica was not used, so the optimization solver failed to read the goal function, etc). You'll need to choose a different solver if you want to simulate the model (or setup an optimica model to run the optimization solver).