Skip to main content
cancel
Showing results for 
Search instead for 
Did you mean: 

Join us for an expert-led overview of the tools and concepts you'll need to become a Certified Power BI Data Analyst and pass exam PL-300. Register now.

Reply
omaffud
Frequent Visitor

DataFormat.Error: We couldn't convert to Number. Happenning when trying to Merge two tables

I am trying to merge 2 tables and I am getting the error below:

 

omaffud_0-1666111520761.png

 

I already added steps on the tables, changing the fields to TEXT but it looks like the error is persisting. I have no idea where that value in the Details is. How can I troubleshoot and find where that error is when merging?

 

Thanks.

 

Otavio

1 ACCEPTED SOLUTION

I solved the issue by fixing the column type just after promoting the headers. It looks like changing it later on the process does not work as it should.

View solution in original post

5 REPLIES 5
amitchandak
Super User
Super User

@omaffud , check the second step, is there a number conversion, where you are getting text value

Share with Power BI Enthusiasts: Full Power BI Video (20 Hours) YouTube
Microsoft Fabric Series 60+ Videos YouTube
Microsoft Fabric Hindi End to End YouTube

I solved the issue by fixing the column type just after promoting the headers. It looks like changing it later on the process does not work as it should.

@amitchandak the error is happening when I expand the item details table column. If the error comes from that table, I do not know where it is because the 2 columns, I want to use from that table are in text format, so I do not know why Power BI is trying to convert to numbers.

 

omaffud_0-1666112967747.png

 

@omaffud , This seems fine. But check the join column datatypes too. and the expected values

Share with Power BI Enthusiasts: Full Power BI Video (20 Hours) YouTube
Microsoft Fabric Series 60+ Videos YouTube
Microsoft Fabric Hindi End to End YouTube

@omaffud , This seems fine. But check the join column datatypes too. and the expected values

Share with Power BI Enthusiasts: Full Power BI Video (20 Hours) YouTube
Microsoft Fabric Series 60+ Videos YouTube
Microsoft Fabric Hindi End to End YouTube

Helpful resources

Announcements
July PBI25 Carousel

Power BI Monthly Update - July 2025

Check out the July 2025 Power BI update to learn about new features.

Join our Fabric User Panel

Join our Fabric User Panel

This is your chance to engage directly with the engineering team behind Fabric and Power BI. Share your experiences and shape the future.

June 2025 community update carousel

Fabric Community Update - June 2025

Find out what's new and trending in the Fabric community.