Join us at FabCon Atlanta from March 16 - 20, 2026, for the ultimate Fabric, Power BI, AI and SQL community-led event. Save $200 with code FABCOMM.
Register now!The Power BI Data Visualization World Championships is back! It's time to submit your entry. Live now!
Hi,
I have two, relatively simple sum measures that produce two sets of counts.
Measure1
100
250
10
Measure2
1500
1000
50
Then I have a simple subtraction measure, Measure2-Measure1. This produces some correct results, however sometimes it produces very incorrect results. For instance, given the above it may produce
(1,500 - 100) = 1400
(1,000 - 250) = 800 ???
(50 - 10) = 40
It should be very simple, but it's not producing the right result. I've tried setting Measure1 and Measure2 equal to a var name, then subtracting those, same issue. I've also tried just shortening the equation to the measure by itself to confirm that it's producing the right counts going into the measure (so 1,000 and 250) and that is fine as well. It just doesn't subtract them correctly about 1/5 of the time.
Any ideas?
Hi @Anonymous,
Can you share a sample file, please? You post the result here. I'm afraid we can't find out the reason.
If these measures are evaluated in the same context, it should be correct. But we don't know if there is any context conversion in the measures.
Best Regards,
Dale
Thanks for your reply Dale. Unfortunately, the data is sensitive. I recreated the pertinent portions but the error was not reproduced in those portions, leading me to believe the error exists somewhere within the pre-built model I'm pulling from.
Hi @Anonymous,
Did you solve the issue? If you can't share the data, you can share some snapshots and the formulas at least.
Best Regards,
Dale
External dependencies will have to resolve this issue unfortunately, I've ruled out problems I can diagnose or solve for from my end in terms of formulas. I'll respond back if/when a solution is reached on this, thanks.
The Power BI Data Visualization World Championships is back! It's time to submit your entry.
Check out the January 2026 Power BI update to learn about new features.
| User | Count |
|---|---|
| 61 | |
| 47 | |
| 39 | |
| 24 | |
| 23 |
| User | Count |
|---|---|
| 144 | |
| 106 | |
| 63 | |
| 38 | |
| 31 |