Press "Enter" to skip to content

Couldn’t Fold Expression to Data Source in Power BI

Chris Webb explains an error message:

If you’re using DirectQuery mode in Power BI you may occasionally run into the following error message:

OLE DB or ODBC error: [Expression.Error] We couldn’t fold the expression to the data source. Please try a simpler expression..

What does it mean and how can you fix it?

Read on for the answer, as well as a quick depiction of query folding.

Leave a Reply

Your email address will not be published.

This site uses Akismet to reduce spam. Learn how your comment data is processed.