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
BobWong1
Helper II
Helper II

DAX Studio

Hi there,

I didn't run DAX Studio version 3.0.5 for quite sometime, which previously was running just fine.

Recently, after I launched DAX Studio from the ‘External Tools", I get this error message;

The 2 red text says:

"The following error occurred while updating the connection: An item with the same key has already been added.

An item with the same key has already been added."

Does anyone of there know what is causing this problem?

I posted this problem there is that, I am not quite sure whether latest Power BI Desktop issue (2023 December update) or DAX Studio itself having problem?

I got another PC installed with Power BI Desptop and DAX Studio also had the similair problem, even with other Power BI Desktop files.

TIA guys!

1 ACCEPTED SOLUTION
Storry
Frequent Visitor

Installing DAX Studio Version 3.0.11 hepled

View solution in original post

5 REPLIES 5
Storry
Frequent Visitor

Installing DAX Studio Version 3.0.11 hepled

Hi Storry,

YES, it does solved the problem. Many Thanks!

Storry
Frequent Visitor

Hi!

I have the same problem with the latest versions of DAX Studio (3.0.10) and Power BI Desktop (2.124.1554.0 December 2023). And I haven't run DAX Studio for a couple of months. Previously everything was fine. So, I also hope that it's something with the version and it will be fixed soon.

joexploit1
New Member

Could you try to install the latest Dax studio version - Version 3.0.8? 

Thanks for asking.

I did installed the latest DAX Studio on another PC, but it doesn't solve the problem. I highly suspect that the problem lies in Power BI Desktop.

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.