If you are also troubled by this Power BI errors, here are a couple of troubleshooting tips to resolve the issue for a few Dataformat.errors.
How to fix common dataformat.errors in Power BI
1. DataFormat.Error: We reached the end of the buffer
Check the File Size Wait, Wait and Wait! If the issue persists, do the following. Learn more about adding filters in Power BI by reading this guide.
2. Power BI dataformat.error external table is not in the expected format
Save the File with Excel Change Type in Applied Steps If the issue persists, try removing initial changed of for date data type from number to text.
3. Power BI dataformat.error invalid cell value #name/ #ref
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How to add commas to numbers in Power BI [QUICK GUIDE] How to refresh data in Power BI [STEP-BY-STEP GUIDE]
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