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! Get ahead of the game and start preparing now! Learn more
Hello,
Please help. I've added a new column in my csv data source and Power BI isn't recognising it. In the Advanced Editor source file the number of columns isn't listed so I can't amend it there:
I have also updated to the correct number of columns in my sample file (33) and my sample file shows the missing columns, however when I load this the column does not pull through into my data table and there are only 32 columns....
Any ideas please?
Thank you
Quenril
Solved! Go to Solution.
Hi,
Since you mention Advanced Editor, please try this in Power Query:
- click on the table you're interested in
- go to Advanced Editor
- in the "let" section, look for the Column=<number> argument
- replace <number> with <null> . The result should be Column=null
- hit Done and then do a refresh
If this solved yout problem then please mark it as the solution so others can see it.
Best,
Hi,
Since you mention Advanced Editor, please try this in Power Query:
- click on the table you're interested in
- go to Advanced Editor
- in the "let" section, look for the Column=<number> argument
- replace <number> with <null> . The result should be Column=null
- hit Done and then do a refresh
If this solved yout problem then please mark it as the solution so others can see it.
Best,
Hi MNedix,
Thank you so much, that's done it! Star!
Quenril
@Quenril Perhaps there is something in your Transform file function that is selecting columns perhaps?
The Power BI Data Visualization World Championships is back! Get ahead of the game and start preparing now!
Check out the November 2025 Power BI update to learn about new features.
| User | Count |
|---|---|
| 69 | |
| 47 | |
| 44 | |
| 28 | |
| 19 |
| User | Count |
|---|---|
| 200 | |
| 125 | |
| 102 | |
| 69 | |
| 53 |