topic Re: ArcGIS Pro - Python Toolbox in ArcGIS API for Python Questions

ArcGIS Pro - Python Toolbox

Nur_Efarina_JaliJali — Tue, 29 Jul 2025 02:25:55 GMT

Hello everyone,

Hi, I'm Nur from Malaysia. I'm a beginner in Python and currently experimenting with building a Python toolbox to automatically calculate yearly forest cover changes in my region. I created the script with help from ChatGPT.

When I run the tool, the analysis starts but I get the following error message:

"Workspace is invalid output workspace"

Can anyone help me understand and fix this issue?

BIG THANKS in advance 🙂

Re: ArcGIS Pro - Python Toolbox

DanPatterson — Tue, 29 Jul 2025 03:35:46 GMT

The error reads as...

The specified catalog path for the output does not exist, or you may not have permissions to write.

So assuming the path exists and it is your computer and hence you have permission to write to your own folder, I would suggest navigating to a local folder on your computer with a much shorter path and filename and try again (eg c:\output\myoutput.tif) Also, spaces and punctuation are often the source of breaking tool functionality

Re: ArcGIS Pro - Python Toolbox

Nur_Efarina_JaliJali — Mon, 04 Aug 2025 01:50:08 GMT

Thanks, I've tried to put a shorter part for output, but the same error occurred. Just a heads-up, I’ve updated my ArcGIS Pro to the latest version, if that influences the process.

Thanks for your help ya.

Re: ArcGIS Pro - Python Toolbox

DanPatterson — Mon, 04 Aug 2025 08:14:34 GMT

If you can run the process manually and it works, that leaves the script. It isn't clear what tool(s) you are using/calling in your script. The error suggests a permissions issue if a short local filepath didn't help

Re: ArcGIS Pro - Python Toolbox

MatthewDriscoll — Fri, 08 Aug 2025 17:58:59 GMT

How did you write your path? If you did C:\Users\my.tif, change it to C:/Users/my.tif. Or better yet use r"C:\Users\my.tif", the quotes help because of the spaces in your path.

Re: ArcGIS Pro - Python Toolbox

Nur_Efarina_JaliJali — Mon, 23 Feb 2026 05:19:22 GMT

Thank you so much for your response. I was occupied with some other tasks and now have some time to look back into this issue. May I know how can i change or edit the path?

Re: ArcGIS Pro - Python Toolbox

DanPatterson — Mon, 23 Feb 2026 11:03:43 GMT

The folder icons beside the input and output parameters allow you to navigate to an appropriate workspace (eg a folder or a geodatabase within a folder), then select the input or provide a name for the output where appropriate