Subprocess for 'conda run [' ......']' command failed.

vscode 1.41.1
Latest version of ms-python.python 2020.1.57204
python 3.7.5, Mac OSX Catalina

I am running miniconda and have selected my env Python 3.7.5 64-bit ('octant':conda)
(which is displayed in lower left of window)

The run button outputs the following

source /Users/paulyoung/miniconda3/bin/activate
conda activate octant
➜  DataPrep source /Users/paulyoung/miniconda3/bin/activate
conda activate octant
conda run -n octant python /Users/paulyoung/MyData/Code/DataPrep/Prepare_Dataset.py
(base) ➜  DataPrep conda activate octant
(octant) ➜  DataPrep conda run -n octant python /Users/paulyoung/MyData/Code/DataPrep/Prepare_Dataset.py
ERROR conda.cli.main_run:execute(30): Subprocess for 'conda run ['python', '/Users/paulyoung/MyData/Code/DataPrep/Prepare_Dataset.py']' command failed.  (See above for error)
Traceback (most recent call last):
  File "/Users/paulyoung/MyData/Code/DataPrep/Prepare_Dataset.py", line 1, in <module>
    import numpy as np
ModuleNotFoundError: No module named 'numpy'

However from within the terminal I can run the file with python Prepare_Dataset.py with no issues (the terminal has a prompt showing me that I am within my virtualenv)

BTW have run conda list at the terminal
and numpy is in the environment