Hello,
I am going through Cognite Data Fusion Fundamentals and am having an issue that I cant figure out. After multiple attempts I am loading 1 row of data to try and figure out my issue.
I make it to the “Preview the Transformation” step:
![](https://uploads-eu-west-1.insided.com/cognite-en/attachment/c09be575-779f-4c57-a00c-0624ea14c5ca.png)
The next step is to “Run the Transformation” step and this is where I am running into an issue. I get the below error message and theres no suggestion on what to do to correct my apparent error. Any idea what to do or how to progress? I just want to finish this course.
![](https://uploads-eu-west-1.insided.com/cognite-en/attachment/39cbe393-6b4a-4c06-a1e8-c6b69052495e.png)
-George
Best answer by Kristian Gjestad Vangsnes
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