mlab.matlabpipe.MatlabConnectionError: timeout

[ruozhichen]

When I executed the following commands, trying to call matlab function, it failed and the error trace is given at the end.
from mlab.releases import latest_release as matlab
matlab.plot([1,2,3,4,5],-'o')

It happened in Ubuntu. And I tested mlab in Windows before, it succeeded.
So I don't know why it doesn't work in Ubuntu, I try to solve it but found nothing,
I will be appreciated If anyone has some suggestions.
If you have solved it before or know this error, please tell me.

Error:
File "/usr/local/lib/python2.7/site-packages/mlab/mlabwrap.py", line 607, in mlab_command
return self._do(name, *args, **update({'nout':nout}, kwargs))
File "/usr/local/lib/python2.7/site-packages/mlab/mlabwrap.py", line 547, in _do
res = self._get_values(resSL)
File "/usr/local/lib/python2.7/site-packages/mlab/mlabwrap.py", line 483, in _get_values
res.append(self._get(varname))
File "/usr/local/lib/python2.7/site-packages/mlab/mlabwrap.py", line 568, in _get
vartype = self._var_type(varname)
File "/usr/local/lib/python2.7/site-packages/mlab/mlabwrap.py", line 436, in var_type
res_type = mlabraw.get(self.session, "TMP_CLS")
File "/usr/local/lib/python2.7/site-packages/mlab/mlabraw.py", line 72, in get
return matlab.get(var_name)
File "/usr/local/lib/python2.7/site-packages/mlab/matlabpipe.py", line 250, in get
self._read_until('start_binary\n', on_new_output=on_new_output)
File "/usr/local/lib/python2.7/site-packages/mlab/matlabpipe.py", line 294, in _read_until
raise MatlabConnectionError('timeout')
mlab.matlabpipe.MatlabConnectionError:timeout.

[jimmy-dq]

@ruozhichen HI， have you solved this problem ? I face the same problem.

[ruozhichen]

@Handworker
Sorry，I still not find a solution. However, I use another way to call matlab from python. You can choose matlab engine for python.
install:
http://cn.mathworks.com/help/matlab/matlab_external/install-the-matlab-engine-for-python.html
how to call matlab script:
http://cn.mathworks.com/help/matlab/matlab_external/call-user-script-and-function-from-python.html
Hope this could help you.

[jimmy-dq]

@ruozhichen Thanks!

[andrewminer]

I've run into this problem as well, and, in my case, it was because the function I was calling was running into an error, and therefore never returned. This caused the pipe to never find the ___MATLAB_PIPE_COMMAND_ENDED___ terminator it was waiting for, and thus, the timeout message.

I diagnosed the problem my adding print "output_tail: %s" % (output_tail) just before this line so I could see exactly what was going on.

I'd suggest that the fix is to modify that _read_until function to look for errors and to throw an exception if one is returned.