At source activate pyoccenv --- 'source' is not recognized as an internal or external command, operable program or batch file

[WillAdams]

This happened after installing the current anaconda in Windows 10 and successfully running

conda create --name=pyoccenv python=3.9

[Dicurantum]

It's probably a typo or copy/paste error. The command is conda activate (to activate the environment that you just created).