Why did the number of responses in Chattermill drop?
The Chattermill help pages give 4 common reasons. The first to rule out: If a column header in your data file changes, the data in that column can't be uploaded, so comments or scores can go missing.
What causes it?
If a column header in your data file changes, the data in that column can't be uploaded, so comments or scores can go missing.
In the Chattermill help:
If a column header changes, we will not be able to upload the data in that column
Data guidelines, read 2026-11-12.Changing how your data files are named can cause an upload to be missed.
In the Chattermill help:
If a file name is changed it could result in a missed upload.
Data guidelines, read 2026-11-12.Two columns with the same header can stop the data from uploading.
In the Chattermill help:
Each header must be distinct from all other headers in the upload, otherwise the data will not be uploaded
Data guidelines, read 2026-11-12.Chattermill reads files straight from S3 and asks for them unzipped, so a zipped file can be missed.
In the Chattermill help:
Kindly do not upload zipped files, as Chattermill ingests files directly from S3
S3 integration, read 2026-11-12.
How do I check it myself?
Check that each file you send has a date in its name, as Chattermill asks.
In the Chattermill help:
Please make sure to include a date in the file name.
S3 integration, read 2026-11-12.Check that every record has a score and a date, since both are required.
In the Chattermill help:
The score and date fields are required.
S3 integration, read 2026-11-12.
How does Chattermill work with Feder?
- Connect Chattermill to Feder and it joins your Experience apps.
- When you connect Chattermill, Feder checks the connection straight away and shows Connected only when that check passes. If a reading cannot be taken later, Feder shows it as not read, never as zero.
Some numbers are too quiet to judge daily, such as a form filled in a few times a week. Until there is enough of your own history to judge a change, Feder says it is still learning and scores nothing, rather than guessing.
See whether you can trust the numbers in Chattermill, one of your Experience apps. Feder only reads. It never changes anything in Chattermill.
What else goes wrong with these numbers?
- Why did my Chattermill NPS or CSAT numbers change after a data upload?Chattermill
- Why did my sentiment score drop in Chattermill?Chattermill
- Why did Google Analytics stop collecting data?Google Analytics
- Why aren't my key events showing in Google Analytics?Google Analytics
- Why does Google Analytics show (not set)?Google Analytics
See every question.
Where do these answers come from?
Every cause and check on this page comes from the Chattermill help pages, quoted above with the date we read them. Last reviewed 2026-11-12. We read them again by 2027-11-12. If one changes, this page changes or comes down.