topic Re: Error Cloning Python Environment Pro 3.4.3 in ArcGIS Pro Questions

Error Cloning Python Environment Pro 3.4.3

EricSimpson96 — Thu, 08 Jan 2026 17:17:24 GMT

I am attempting to clone my Python environment on a new PC running ArcGISPro 3.4.3, and I get the following error:

> "C:\Program Files\ArcGIS\Pro\bin\Python\Scripts\conda.exe" create --clone "C:\Program Files\ArcGIS\Pro\bin\Python\envs\arcgispro-py3" -p "C:\Users\simpson_e\AppData\Local\ESRI\conda\envs\arcgispro-py3-clone" --no-shortcuts --pinned --yes

CondaHTTPError: HTTP 404 NOT FOUND for url <https://conda.anaconda.org/esri-build/win-64/vc-14.38-0.conda>

Elapsed: 00:00.157106

CF-RAY: 9bad35408b1ba548-MIA

An HTTP error occurred when trying to retrieve this URL.

HTTP errors are often intermittent, and a simple retry will get you on your way.

CondaHTTPError: HTTP 404 NOT FOUND for url <https://conda.anaconda.org/esri-build/win-64/vs2015_runtime-14.38.33130-0.conda>

Elapsed: 00:00.185534

CF-RAY: 9bad35408f058c20-MIA

An HTTP error occurred when trying to retrieve this URL.

HTTP errors are often intermittent, and a simple retry will get you on your way.

CondaHTTPError: HTTP 404 NOT FOUND for url <https://conda.anaconda.org/esri-build/win-64/vc-14.38-0.conda>

Elapsed: 00:00.157106

CF-RAY: 9bad35408b1ba548-MIA

An HTTP error occurred when trying to retrieve this URL.

HTTP errors are often intermittent, and a simple retry will get you on your way.

Source: C:\Program Files\ArcGIS\Pro\bin\Python\envs\arcgispro-py3

Destination: C:\Users\simpson_e\AppData\Local\ESRI\conda\envs\arcgispro-py3-clone

Packages: 280

Files: 15

Copying pinned file from C:\Program Files\ArcGIS\Pro\bin\Python\envs\arcgispro-py3\conda-meta\pinned to C:\Users\simpson_e\AppData\Local\ESRI\conda\envs\arcgispro-py3-clone\conda-meta\pinned

Downloading and Extracting Packages: ...working... done

Cleaning up...

Destination folder removed.

I tried going to the URL that is indicated as having a 404 error, and it is indeed blank. Is there an alternative method I can try? It seems that Anaconda is changing their website.

Thank you!

Re: Error Cloning Python Environment Pro 3.4.3

ZenMasterZeke — Thu, 08 Jan 2026 17:20:56 GMT

Is there some reason you can't clone from the Package Manager in Pro?

Re: Error Cloning Python Environment Pro 3.4.3

EricSimpson96 — Thu, 08 Jan 2026 17:22:56 GMT

That is where I tried it when I received this error, sorry for forgetting to include that.

Re: Error Cloning Python Environment Pro 3.4.3

ZenMasterZeke — Thu, 08 Jan 2026 21:18:39 GMT

Hmm, the error messages look like they're coming from the command line.

At the urls above, the page gives a 'package not found'

At a shortened URL, the page looks like this:

so? This page might help. You might try creating your environment from the command line with venv and then installing the arcgis package. See also https://developers.arcgis.com/python/latest/guide/get-started/

Maybe check here as well. I'm not a conda expert, so take that for what it's worth. ESRI doesn't recommend it, but you could also use pip to install it.

Re: Error Cloning Python Environment Pro 3.4.3

AndrewBryson1 — Fri, 09 Jan 2026 20:27:31 GMT

Just ran into this same issue for the first time today -- commenting to follow.

Re: Error Cloning Python Environment Pro 3.4.3

Joa808 — Fri, 23 Jan 2026 01:00:54 GMT

I am also getting the same error. Any solutions?

Re: Error Cloning Python Environment Pro 3.4.3

EricSimpson96 — Fri, 23 Jan 2026 01:13:34 GMT

I wound up just going to the environments folder and making a manual copy
via copy and paste. Just give it a new name.

Re: Error Cloning Python Environment Pro 3.4.3

Joa808 — Fri, 23 Jan 2026 01:30:58 GMT

Thank you sir that worked

Re: Error Cloning Python Environment Pro 3.4.3

AndrewBryson1 — Fri, 23 Jan 2026 15:03:45 GMT

Yep, the low-tech copy and paste solution did the trick. Thanks!

I'm still curious about the cause of the issue, if anyone has looked into it further. Weirdly, the same clone process that didn't work for the user I was supporting worked just fine on my machine.

Re: Error Cloning Python Environment Pro 3.4.3

Joa808 — Fri, 23 Jan 2026 17:42:00 GMT

I ended up needing to add a package to the copy pasted env and it didn't work. But what did work for me was updating arcgis pro. Then it actually let me clone it regularly. If that doesn't work for you, try to repair arg gis pro.

Re: Error Cloning Python Environment Pro 3.4.3

StuartPowling — Wed, 28 Jan 2026 14:20:37 GMT

After several hours of AI telling me to clone using conda in python ... it didn't suggest copy and paste. Works absolutely fine. Thank you.