Cannot create unknown type '{http://schemas.uipath.com/

[AaronWei (Shuo Wei)]

Hi

I have a robot which could be run in the studio but when I publish it and try to run it in the robot, I get the message:

An error appeared while executing ‘robot_name’
Error message: Cannot create unknown type '{http://schemas.uipath.com/workflow/activities}ExcelApplicationScope".

I have read the familiar topic in the forum but didn’t find an useful answer, do you have any idea?
(All the packages are updated to the latest version, and I have checked the project.json file and found nothing odd.)
Thanks!

[venkat4u (venkat)]

before you run the bot validate the XAML File bcz either the dependency Package is not added or the updated package is not supporting the previous package activity.

[AaronWei (Shuo Wei)]

I have checked all the packages and their versions but didn’t find anything wrong. Is there any other possibility or solution?

[indra]

@AaronWei In the output panel you can find error message in red colour can you capture and share screen shot here

[loginerror (Maciej Kuźmicz)]

Hi @AaronWei

This is due to the Robot not having access to your local packages. See here:

Cannot create unknown type - V2018.2.3 Onwards - Troubleshooting steps

Description System.Xaml.XamlObjectWriterException: Cannot create unknown type Troubleshooting steps Explanation With Solution Approach When the process is executed from the robot, It searches for the activity version in the following location: Robot Location - C:\Users{user profile} \ .nuget\packages Orchestrator feed - ~/NuGetPackages/Activities MyGet feed - https://www.myget.org/F/workflow/ Reason of issue: The issue is because packages are not downloaded in the Robot machine and …

One other possible solution is also here:

Installing package

Hi Maciej I found a solution and found the root cause. After disabling myget.org and nuget.org robot was able to download the activities from orchestrator. Maybe it would be nice to put a note on robot package installation that if robot does not have connection to internet before publishing nuget.org and myget.org should be unchecked at development studio Regards , Yalcin

[AaronWei (Shuo Wei)]

I don’t use Orchestrator, there’s only studio and robot on the computer.
And I have checked ‘project.json’, <C:\Program Files(x86)\UiPath\Studio\Packages>, <C:\Users"UserName"\AppData\Local\UiPath\Activities>, the version of packages are all same.

[AaronWei (Shuo Wei)]

I can run it in Studio but cannot via Robot, so there is no error message in the output panel.

[sebas0910 (Sebastián Rivera Monsalve)]

Hi Guys, any solution ?

[byuli]

Try this, Check that you have a reference to a local activity feed in the Nuget.config file in the following locations:

• C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\NuGet
• C:\Program Files (x86)\UiPath\Studio.
• C:\Users%userprofile%\AppData\Roaming\NuGet

Keep at least one feed active, if local feed is not present, add it, like so

[rqmerino (Ramiro Merino)]

Thanks, @byuli! By following your suggestion and editing Nuget.config in the Robot-only machine I was able to avoid the error I was having ie. custom package not being recognized by Robot and Robot issued an error “Cannot create unknown type”.

I read several posts and explored different alternatives but this was the one that solved it. Thanks again.

[Seetha_t (Seetha)]

@Installing package

After disabling myget.org

Got this error message:
#1680 - while executing ‘robot_name’
Error message: Cannot create unknown type of

Re-referenced the custom packages and publish the project again to orchestrator which enables the custom package references back in active/restored as expected. It worked for me.

Apparently the reference got broken in the orchestrator and republish helped my case to re-establish reference to orchestrtor

Thanks