Error invoking sample model provided

[gamorvi]

python3 pySCS.py models/sample/

Processing: models/sample/model.py
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pydot.py", line 1915, in create
working_dir=tmp_dir,
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pydot.py", line 136, in call_graphviz
**kwargs
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/subprocess.py", line 709, in init
restore_signals, start_new_session)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/subprocess.py", line 1344, in _execute_child
raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'dot': 'dot'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "pySCS.py", line 592, in
exec(open(model_file).read())
File "", line 57, in
File "pySCS.py", line 269, in process
self.dfd()
File "pySCS.py", line 283, in dfd
output_dfd()
File "pySCS.py", line 239, in output_dfd
dfd_in_progress.write_png(dfd_file)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pydot.py", line 1734, in new_method
encoding=encoding)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pydot.py", line 1817, in write
s = self.create(prog, format, encoding=encoding)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pydot.py", line 1922, in create
raise OSError(*args)
FileNotFoundError: [Errno 2] "dot" not found in path.

[davevs]

pySCS uses pydot which uses dot which is part of the Graphviz package.
So the key is make sure Graphviz is installed and python can find it.
Personally I use Anaconda which has all dependencies already in place.