CVodeError while simulating with pyFMI - python-3.x

Question

I try to set up the pyFMI on Anaconda (Python 3.6.8)
Installed all the required packages listed on the pyFMI site. The fmu is loaded without the issue but while I try to simulate the fmu I get an error:
Could not find cannot import name 'radau5'
Could not find cannot import name 'dopri5'
Could not find cannot import name 'rodas'
Could not find cannot import name 'odassl'
Could not find ODEPACK functions.
Could not find RADAR5
Could not find GLIMDA.
Traceback (most recent call last):
File "assimulo\solvers\../lib/sundials_callbacks_ida_cvode.pxi", line 240, in assimulo.solvers.sundials.cv_jac
File "C:\Users\d60378\AppData\Local\Continuum\anaconda3\lib\site-packages\pyfmi\simulation\assimulo_interface.py", line 733, in j
A = self._model._get_A(add_diag=True, output_matrix=self._A)
File "src\pyfmi\fmi.pyx", line 6041, in pyfmi.fmi.FMUModelBase2._get_A
File "src\pyfmi\fmi.pyx", line 7592, in pyfmi.fmi.FMUModelME2._get_directional_proxy
File "src\pyfmi\fmi.pyx", line 5989, in pyfmi.fmi.FMUModelBase2._get_directional_proxy
TypeError: Expected tuple, got dict_keys
Traceback (most recent call last):
File "<ipython-input-1-6c340902ef15>", line 28, in <module>
res = model.simulate(options=opts,start_time=tstart, final_time=tstart+172200)
File "src\pyfmi\fmi.pyx", line 7522, in pyfmi.fmi.FMUModelME2.simulate
File "src\pyfmi\fmi.pyx", line 304, in pyfmi.fmi.ModelBase._exec_simulate_algorithm
File "src\pyfmi\fmi.pyx", line 300, in pyfmi.fmi.ModelBase._exec_simulate_algorithm
File "C:\Users\d60378\AppData\Local\Continuum\anaconda3\lib\site-packages\pyfmi\fmi_algorithm_drivers.py", line 520, in solve
self.simulator.simulate(self.final_time, self.ncp)
File "assimulo\ode.pyx", line 168, in assimulo.ode.ODE.simulate
File "assimulo\ode.pyx", line 288, in assimulo.ode.ODE.simulate
File "assimulo\explicit_ode.pyx", line 101, in assimulo.explicit_ode.Explicit_ODE._simulate
File "assimulo\explicit_ode.pyx", line 187, in assimulo.explicit_ode.Explicit_ODE._simulate
File "assimulo\solvers\sundials.pyx", line 1894, in assimulo.solvers.sundials.CVode.integrate
File "assimulo\solvers\sundials.pyx", line 1926, in assimulo.solvers.sundials.CVode.integrate
CVodeError: {-1: 'The solver took max internal steps but could not reach tout.', -2: 'The solver could not satisfy the accuracy demanded by the user for some internal step.', -3: 'Error test failures occurred too many times during one internal time step or minimum step size was reached.', -4: 'Convergence test failures occurred too many times during one internal time step or minimum step size was reached.', -5: 'The linear solvers initialization function failed.', -6: 'The linear solvers setup function failed in an unrecoverable manner.', -7: 'The linear solvers solve function failed in an unrecoverable manner.', -8: 'The user-provided rhs function failed in an unrecoverable manner.', -9: 'The right-hand side function failed at the first call.', -10: 'The right-hand side function had repeated recoverable errors.', -11: 'The right-hand side function had a recoverable error, but no recovery is possible.', -12: 'The rootfinding function failed in an unrecoverable manner.', -20: 'A memory allocation failed.', -21: 'The cvode_mem argument was NULL.', -22: 'One of the function inputs is illegal.', -23: 'The CVode memory block was not allocated by a call to CVodeMalloc.', -24: 'The derivative order k is larger than the order used.', -25: 'The time t is outside the last step taken.', -26: 'The output derivative vector is NULL.', -27: 'The output and initial times are too close to each other.', -41: 'The sensitivity right-hand side function failed unrecoverable.'}
Would appreciate any hints where to look for the possible issue.

Answer 1

Kelamahim, how have you installed the PyFMI package? I have used
conda install -c chria pyfmi
and it works.
Only
Could not find RADAR5
Could not find GLIMDA are shown in the execution, but my models works. Hope this helps.

Answer 2

The solution is downgrading to Anaconda 3 Python 3.6.2 and installing with conda the pyfmi version 2.4.0

Answer 3

I have been using Anaconda2 (Conda 4.6.8/python 2.7.15). Here's the installation process:
FMIL is built from source code using CMake
pyfmi is installed via conda install -c chria pyfmi
assimulo is installed via conda install -c conda-forge assimulo
wxPython 2.8.12.1 (classic) is installed via the Windows installer available on sourceforge
Other dependencies can be installed from pip
I also saw the following warning messages after loading pyfmi in python, but my simulation doesn't seem to be affected:
Could not find cannot import name radau5
Could not find cannot import name dopri5
Could not find cannot import name rodas
Could not find cannot import name odassl
Could not find ODEPACK functions.
Could not find RADAR5
Could not find GLIMDA.
HTH

Answer 4

pyFMi is also available from the conda-forge channel:
https://anaconda.org/conda-forge/pyfmi
I permanentely added that channel, because it has reproducible builds and a huge number of packages, so usually dependencies can be resolved.
The following worked for me, in Anaconda3 with Python 3.6:
conda config --append channels conda-forge
conda install pyfmi
conda list