Forum Migration Notice
Update (2026-01-21): The user forums are now in read-only mode pending the data migration.

Update (2026-01-12): The user forums will be put into read-only mode on the 21st of January, 00:00 CET, to prepare for the data migration.

We're transitioning to a more modern community platform by beginning of next year. Learn about the upcoming changes and what to expect.

External Axis problem

RobotStudio .NET exception: Could not load type 'RobotStudio.Services.RobApi.RobConfigurationExtensionMethods' from assembly 'RobotStudio.Services.RobApi.Desktop, Version=20.2.9116.0, Culture=neutral, PublicKeyToken=null'.

I get the above error when I try to use external axis wizard for an external axis that I created on my own.

I followed the following two youtube videos: 
https://www.youtube.com/watch?v=CffgcZrR7VI&t=165s
https://www.youtube.com/watch?v=s1Vk-xUDGy4

I followed the exact steps shown in those videos using an earlier version of robotstudio (maybe 2019) and it worked perfectly fine. But the current robotstudio version 2020.4 throws this error even though I follow the exact steps. I used 2020.2 version of the robotstudio and I still get the same error.

Is it some kind of a compatibility issue with the version of robot studio?

Any help is appreciated.