Can not attach ipynb with large size to composer

Support Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

can not attach ipynb with large size to composer

Steps to Reproduce

attach a ipynb with its size larger than 8MB to composer, you can see nothiing happen

Expected Behavior

ipynb was attached

Screenshots / Screen Recordings

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.1.50 (system setup)
VSCode Version: 1.105.1
Commit: 56f0a83df8e9eb48585fcc4858a9440db4cc7770
Date: 2025-12-06T23:39:52.834Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Windows_NT x64 10.0.19045

Does this stop you from using Cursor

Yes - Cursor is unusable

2

Hey, thanks for the report.

Quick question: are you working over SSH? If so, could you try reproducing this locally (without SSH/Remote) to see if it still happens?

It also looks like you may be hitting a file size limit when attaching files to chat. Cursor has limits on attachment size, and for .ipynb files, 8 MB can exceed that limit.

Could you please:

  1. Check if this reproduces in a local project (no SSH/Remote)?
  2. Share the exact size of the .ipynb file.
  3. Check Developer Tools console (Help > Toggle Developer Tools) while trying to attach it. Do you see any errors?

Let me know what you find.

3

Hi, thanks for your quick response.

  1. Yes. This issue also occurs in local project
  2. OK. Uploading .ipynb files in cursor forum is not allow. So I change its ext to .txt
  3. I cannot see any errors/messages in Developer Tools while trying to attach .ipynb files with large size.

fea_analysis.ipynb.txt (2.3 MB)

1 Like
4

Thanks for the info and the file. I’ll pass this along to the team.

1 Like
6

Is there any good news?