Help, blocking bug! Error calling tool "MultiEdit"

[sasha]

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

When AI generates response in the chat and tries to call a tool, it either prints

• Error calling tool “MultiEdit”
• or “the string to replace was not found in the file”
• or even “The model provided an ambiguous search string to replace”

Sometimes it works and does edit the file, but in most cases it doesn’t, so AI does not finish anything.

Steps to Reproduce

• Open AI Chat, then ask to change something in the code.
• Then observe its stream, and when it tries to edit files, it ends up with the errors I listed above. It retries more and more, but it never helps.

Expected Behavior

I expect it to be able to edit files like it did before I upgraded to version 1.5.5.

Screenshots / Screen Recordings

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Version: 1.5.5
VSCode Version: 1.99.3
Commit: 823f58d4f60b795a6aefb9955933f3a2f0331d70
Date: 2025-08-25T17:40:25.290Z (1 day ago)
Electron: 34.5.8
Chromium: 132.0.6834.210
Node.js: 20.19.1
V8: 13.2.152.41-electron.0
OS: Darwin arm64 23.6.0

Does this stop you from using Cursor

Yes - Cursor is unusable

[sanjeed5 (Sanjeed)]

Thanks for reporting this.

Please try these steps:

• Start a new chat conversation - AI can sometimes get stuck in a loop with incorrect tool usage, and a fresh chat often resolves these errors.
• Try smaller, more specific edits - Break down larger changes into smaller chunks as the MultiEdit tool can struggle with complex or ambiguous modifications

If the issue persists across new chats, please get a Request ID from the chat sidebar menu → “Copy Request ID” and share it here so the team can investigate the specific tool failures. Cursor – Getting a Request ID

Please let us know if this still happens after these steps.

[sasha]

Yeah, apparently your approach works, but now I have even worse problems with a network connection. I’m gonna post a new bug report.