What does: There was an error deserializing the evaluation results. .. Mean?

[Walt1010]

I made some minor changes to a PBI report that involves a couple of merges. Now, at a steps where I delete a particular column, I get the error message: "There was an error deserializing the evaluation results. The operation might succeed on a retry.". I've tried re-creating that step but it still does it. Any ideas on what could be causing this?

[pankajnamekar25 · Accepted solution]

Hello @Walt1010 

It is typically related to Power BI’s inability to process or interpret the underlying data during a transformation step in your case, likely during a column deletion after a merge

Thanks,
 Pankaj Namekar | LinkedIn

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