There is an instance of anaconda navigator already running error

python-3.x windows anaconda conda

I met the same problem a few days ago. I found the anaconda navigator will start a process called pythonw. So the following is my solution:

open a cmd window;
use command tasklist | findstr "pythonw" to find the pid of pythonw, like 37200;
use command tskill 37200 to kill the process.

By the way, my OS is Windows.

python-3.x windows anaconda conda

I got the same error in MAC. logoff & login did not resolve the issue and the below command solved my issue in mac. Restart not required.

killall python

python-3.x windows anaconda conda

one of the following will solve your issue in ubuntu:

killall Anaconda-Navigator anaconda-navigator --reset

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