CSV files cannot be analyzed 01.09.2026

OpenAI

Heat trend

Collecting trend data

The percentage is based on available heat signal, not comment count or independent people.

I use ChatGPT to analyzed some information in csv files. It was working great until today.

Now it says that attachments upload successfully and appear in the conversation, but the corresponding sandbox files are missing when reading them. I tried with files that worked before, but still get the same issue.

Is anyone else facing this problem?