plot_model of Keras installed on Windows may return pydot and graphviz related error like "Graphviz's executables are not found'. The error cause is that the computer does not know the path of Graphviz's executable exactly mentioned as the error message. The solution is explained here.
- Install GraphViz software not python module
- add GraphViz's bin directory to system path
- install graphviz like conda install graphviz
- install pydot like pip install git+https://github.com/nlhepler/pydot.git
