conda-forge::tqdm-4.19.4-py_0 - CondaError: Cannot link a source that does not exist

问题

I'm trying to install SpaCy on Windows 7 using Conda and getting the following error:

conda install -c conda-forge spacy

tqdm-4.19.4-py 100% |###############################| Time: 0:00:00 804.27 kB/s
ERROR conda.core.link:_execute_actions(337): An error occurred while installing package 'conda-forge::tqdm-4.19.4-py_0'.
CondaError: Cannot link a source that does not exist. C:\Users\xxxxx\AppData\Local\Continuum\Anaconda3\Scripts\conda.exe
Attempting to roll back.

Has anyone else go this and managed to resolve it? I would use Linux if I had a choice but sadly don't.

回答1:

Ok think I finally solved it. Try doing running: conda install tqdm first.

回答2:

I found that it helps to do a

conda update conda

before doing any other upgrade/install operations

回答3:

Run command :

conda config --add pinned_packages defaults::conda

来源：https://stackoverflow.com/questions/46872014/conda-forgetqdm-4-19-4-py-0-condaerror-cannot-link-a-source-that-does-not-e