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ModelicaSystem does not return from call #103
Description
Running the bouncingBall script on a Docker container with Debian and OMModelica installed appears to set up the OMC server but the ModelicaSystem call isn't returned:
omc = OMCSessionZMQ()
2019-10-02 14:56:49,581 - OMPython - INFO - OMC Server is up and running at file:////tmp/openmodelica.darren.port.b1050fd2bee2410895097c0fdfd303a7 pid=294
mod = ModelicaSystem("BouncingBall.mo", "BouncingBall", ["Modelica"])
2019-10-02 14:57:03,275 - OMPython - INFO - OMC Server is up and running at file:////tmp/openmodelica.darren.port.9edb9d062daf471dbefac6523603800c pid=315
But there is no return to the prompt. Ctrl-C gives the following traceback:
^CTraceback (most recent call last):
File "", line 1, in
File "/usr/local/lib/python3.7/dist-packages/OMPython/init.py", line 688, in init
self.__loadingModel()
File "/usr/local/lib/python3.7/dist-packages/OMPython/init.py", line 738, in __loadingModel
self.buildModel()
File "/usr/local/lib/python3.7/dist-packages/OMPython/init.py", line 742, in buildModel
buildModelResult = self.requestApi("buildModel", self.modelName)
File "/usr/local/lib/python3.7/dist-packages/OMPython/init.py", line 765, in requestApi
res = self.getconn.sendExpression(exp)
File "/usr/local/lib/python3.7/dist-packages/OMPython/init.py", line 612, in sendExpression
result = self._omc.recv_string()
File "/usr/local/lib/python3.7/dist-packages/zmq/sugar/socket.py", line 592, in recv_string
msg = self.recv(flags=flags)
File "zmq/backend/cython/socket.pyx", line 791, in zmq.backend.cython.socket.Socket.recv
File "zmq/backend/cython/socket.pyx", line 827, in zmq.backend.cython.socket.Socket.recv
File "zmq/backend/cython/socket.pyx", line 186, in zmq.backend.cython.socket._recv_copy
File "zmq/backend/cython/checkrc.pxd", line 12, in zmq.backend.cython.checkrc._check_rc
KeyboardInterrupt
Thanks
Activity
arun3688 commentedon Oct 2, 2019
@alidaf I think you have not import ModelicaSystem class, OMCSessionZMQ and ModelicaSystem are two different classes
To use ModelicaSystem you need to import like this
alidaf commentedon Oct 3, 2019
HI,
That's not it. I have run the script on a host system with no problems.
alidaf commentedon Oct 8, 2019
I've traced the problem to here (line 742):
arun3688 commentedon Oct 8, 2019
@alidaf But you are not getting any errors when running from normal host systems, with the same line
alidaf commentedon Oct 8, 2019
None. I can give you the dockerfile if you want to create one to try.
arun3688 commentedon Oct 8, 2019
yes you can give me the docker file and i see if i can find something
alidaf commentedon Oct 8, 2019
Dockerfile.txt
adeas31 commentedon Dec 2, 2025
@alidaf can you still reproduce it with the latest code?