Line No. 554, /pagmo_plugins_nonfree/src/snopt7.cpp

[mhmsoota]

Tried to install pykep using conda: but did not show installed or any message of success even after a lot of processing, then ended up using pip install pykep which showed success.
Working in VSCode, Conda environment where the pykep folder was present (Ubuntu 20.04).
When I tried to execute _ex11.py of pykep, I get this error:

(base) mhm@mhm:~/anaconda3/lib/python3.8/site-packages$ /home/mhm/anaconda3/bin/python /home/mhm/anaconda3/lib/python3.8/site-packages/pykep/examples/_ex11.py
Traceback (most recent call last):
  File "/home/mhm/anaconda3/lib/python3.8/site-packages/pykep/examples/_ex11.py", line 63, in <module>
    run_example11()
  File "/home/mhm/anaconda3/lib/python3.8/site-packages/pykep/examples/_ex11.py", line 43, in run_example11
    pop = algo.evolve(pop)
ValueError: 
function: evolve_version
where: /pagmo_plugins_nonfree/src/snopt7.cpp, 602
what: 
An error occurred while loading the snopt7_c library at run-time. This is typically caused by one of the following
reasons:

- The file declared to be the snopt7_c library, i.e. /usr/local/lib/libsnopt7_c.so, is not a shared library containing the necessary C interface symbols (is the file path really pointing to
a valid shared library?)
 - The library is found and it does contain the C interface symbols, but it needs linking to some additional libraries that are not found
at run-time.

We report the exact text of the original exception thrown:

 
function: evolve_version
where: /pagmo_plugins_nonfree/src/snopt7.cpp, 554
what: The snopt7_c library path was constructed to be: /usr/local/lib/libsnopt7_c.so and it does not appear to be a file

Ps: I am beginner at Ubuntu, Pykep and VSCode(have been using for a few months now)