Advance your Data & AI career with 50 days of live learning, dataviz contests, hands-on challenges, study groups & certifications and more!
Get registeredGet Fabric Certified for FREE during Fabric Data Days. Don't miss your chance! Request now
I created a function that I wanted to use to do a calculation when a custom column is being created.
I defined the function something like...
(Source as record, CheckVal as number) =>
When I try to use the function I am passing in the underscore but the function gives an error of "We cannot convert the value null to type Record" which suggests that _ is null.
Any thoughts on what I am doing wrong or an example of how to make this work?
Many thanks,
Trevor
Where do you pass that "_"? For example, is it in Table.SelectRows(table, each func(_, checkVal)) ? Can you put the whole M code here?
Hi Trevb,
What's do you mean by "create a function"? So far as I know, there is no an place where we can create a function. So in your scenario, please elaborate your issue, if possible provide us some screenshots, so that we can make further analysis.
Regards,
Charlie Liao
Check out the November 2025 Power BI update to learn about new features.
Advance your Data & AI career with 50 days of live learning, contests, hands-on challenges, study groups & certifications and more!
| User | Count |
|---|---|
| 97 | |
| 70 | |
| 50 | |
| 42 | |
| 40 |