Error: "spawn dot ENOENT" when open side preview, but i've already installed Graphviz(dot)

Question

enter image description here i followed a tutorial of visualizing a decision tree, i opened a DOT file in VSCODE and installed graphviz extension(by stephanvs),then opened the side preview,

it should display a picture of the decision tree, but the error"spawn dot ENOENT" appeared.

p.s. i can't find the graphviz extension by "João Pinto"

Answer 1

You installed "graphviz extension", but you probably did not install Graphviz itself.
Assuming you are using Windows, in a cmd or powershell window type dot -V. If you get 'dot' is not recognized ..., that is a strong hint.
Go here: https://www.graphviz.org/download/#windows and download and install the 32-bit EXE ofor the latest version.
Then repeat the dot -V test.