Get certified for free when you join Fabric Data Days 2026 and dive into Fabric, Power BI, SQL, AI, and other essential data skills.
Join nowJuly 7 - July 17 | Round 2 of the Power BI Dataviz World Championships. Don't miss your chance! Learn more
I have a column in my dataset for timestamp which comes in as an epoch datetime. I have another column that is the duration (in milliseconds).
I've also created a new column that adds the duration to the timestamp (to get the end date). The formula is:
[timestamp] + #duration(0,0,0,([duration]/1000))
This works perfectly in PowerBi Desktop but when I publish to the service, I get the following error when refreshing the dataset:
We cannot convert the value "[Function]" to type Function. Table: Calls.
Any ideas on why this is? My other Custom Columns and functions all work fine - it's just this one.
Solved! Go to Solution.
Hi @Anonymous ,
Please try the suggestions mentioned in below link:
Regards,
Daniel He
Hi @Anonymous ,
Please try the suggestions mentioned in below link:
Regards,
Daniel He
Thanks! I changed the privacy settings on all the data to Organizatioal and this seems to have worked.
Join us in Barcelona for FabCon and SQLCon, the Fabric, Power BI, SQL, and AI community event. Save €200 with code FABCMTY200.
Join Fabric Data Days 2026: 60 days of free live/on-demand sessions, challenges, study groups, and certification opportunities.
| User | Count |
|---|---|
| 16 | |
| 14 | |
| 9 | |
| 9 | |
| 8 |
| User | Count |
|---|---|
| 33 | |
| 29 | |
| 27 | |
| 25 | |
| 25 |