ModelicaSystem does not return from call

[alidaf]

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

[arun3688]

@alidaf I think you have not import ModelicaSystem class, OMCSessionZMQ and ModelicaSystem are two different classes

>>> from OMPython import OMCSessionZMQ
>>> omc =OMCSessionZMQ()
>>> omc.sendExpression("getClassNames()")

To use ModelicaSystem you need to import like this

>>> from OMPython import ModelicaSystem
>>> mod = ModelicaSystem("BouncingBall.mo", "BouncingBall", ["Modelica"])
>>> mod.sendExpression("getClassNames()")

[alidaf]

HI,
That's not it. I have run the script on a host system with no problems.

[alidaf]

I've traced the problem to here (line 742):

def buildModel(self):
    # buildModelResult=self.getconn.sendExpression("buildModel("+ mName +")")
    buildModelResult = self.requestApi("buildModel", self.modelName)

[arun3688]

@alidaf But you are not getting any errors when running from normal host systems, with the same line

[alidaf]

None. I can give you the dockerfile if you want to create one to try.

[arun3688]

yes you can give me the docker file and i see if i can find something

[alidaf]

Dockerfile.txt