"Your message is too long..." error

Bug Reports
1

Describe the Bug

So I recently updated Cursor to version 1.0.0 (Universal) and I got this error message on a simple prompt

Steps to Reproduce

a simple prompt asking to run a test file and add the file to the context (as usual)

Expected Behavior

Should run the test or give me the command to execute

Screenshots / Screen Recordings

Screenshot 2025-06-19 at 12.50.16 PM.png
Screenshot 2025-06-19 at 12.50.16 PM.png680×167 13.1 KB

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Version: 1.0.0 (Universal)
VSCode Version: 1.96.2
Commit: 53b99ce608cba35127ae3a050c1738a959750860
Date: 2025-06-04T19:21:39.410Z (2 wks ago)
Electron: 34.5.1
Chromium: 132.0.6834.210
Node.js: 20.19.0
V8: 13.2.152.41-electron.0
OS: Darwin x64 24.5.0

Does this stop you from using Cursor

No - Cursor works, but with this issue

2

Hi, its most likely that the model thats selected by Auto may not have enough context for a very large file.

Try to select mode Claude 4 Sonnet as this is one of those with highest token limit.

Actually to run the test you do not need to attach the file, just ask agent to test a specific test, because the tests are not executed by reading the file but by calling the test runner.