Type 'UiPath.CV.CvDescriptor' is not defined

Hi @loginerror … Can you Please help us on this

Can you create a brand new project with a simple CV application scope and activity and test to see if it works, and then post your dependencies?

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Will try Now

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Done …But same error :frowning:


hi, did you find any definition for this problem?


Hey @KMota, the problem isn’t solved yet!

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I contacted uipath support, I’m waiting for feedback

Same here

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In contact with Uipath support I downgraded the computer vision versions and activity and it worked. 2.0.1 CV and 19.7 system.activities

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If you downgrade activities as @KMota described, do you find any success?

There is an internal Jira ticket open on this issue for 19.8.0-ce + 2.1.0

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Just Tried @Kristopher But For me it is not working yet

Please try again when 19.9.x-ce is released (should be before October)


This error continues to persist when using 19.10.0-ce.

Workflow ‘xaml’ has the following compilation errors:
Type ‘UiPath.CV.CvDescriptor’ is not defined.

Has there been an update on this issue?


Hi @cvs0115

Could you maybe do:

  1. Create new project
  2. Install dependencies that cause the issue
  3. Verify the issue is happening

We would appreciate if you would then zip the project folder (including the project.json file) and attach it here on the Forum :slight_smile:

Hi @loginerror

I created a new project that includes CV Scope and a CV Click. I kept it as simple as possible and I continue to get the same error.

FYI I removed the API Key before zipping it.

CV-Test.zip (16.5 KB)

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This is super strange, as it doesn’t happen to me when I open that sample project…

@Cosin any idea here?

@loginerror I get the error when I publish it.

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Hi @cvs0115

Obviously, my bad :man_facepalming:

I reproduced it on my end. I also managed to fix it by adding UiPath.CV namespace:

With that simple fix it publishes without an issue :slight_smile:

hi @loginerror

i am still getting this error even with later versions of activities pack. is it still being looked into


Hi @mgarg1982

Welcome to our UiPath Forum! :slight_smile:

This should be fixed by now, I think.

Could you please open a new topic and provide all the information mentioned here: