[Bug] Anthropic API Error: Missing Tool Result Blocks
Status Closed — duplicate
Maintainer reply None cached
Activity 3 comments · opened Sep 29, 2025 · closed Oct 3, 2025
Bug Description
there was an issue with claude code in previous session, not this one.
Caused Claude Code to totally stop.
API Error: 400 {"type":"error","error":{"type":"invalid_request_error","me
ssage":"messages.40: tool_use ids were found without tool_result
blocks immediately after: toolu_011kEmajbSuwHpQq9pDfVPsH,
toolu_01Cft8uUv4sHVwZDu2Bsgrvw, toolu_01FfP9B9dUtGrMpSsJzvhmD5,
toolu_01FwuaEj4uNzVezH9vMshRJi. Each tool_use block must have a
corresponding tool_result block in the next
message."},"request_id":"req_011CTdPELNN3vsieWLZ3tNBo"}
Environment Info
- Platform: darwin
- Terminal: tmux
- Version: 2.0.0
- Feedback ID: 33d2e9f2-a9ba-42a2-af32-d21d64151451
Errors
[{"error":"Error: Language not supported while highlighting code, falling back to markdown: \n at ZK (file:///Users/jake.cukjati/.nvm/versions/node/v24.3.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:1741:1183)\n at file:///Users/jake.cukjati/.nvm/versions/node/v24.3.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:1741:911\n at Array.map (<anonymous>)\n at vX (file:///Users/jake.cukjati/.nvm/versions/node/v24.3.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:1741:902)\n at rJB (file:///Users/jake.cukjati/.nvm/versions/node/v24.3.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:2847:9380)\n at CC (file:///Users/jake.cukjati/.nvm/versions/node/v24.3.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:34:19415)\n at Xp (file:///Users/jake.cukjati/.nvm/versions/node/v24.3.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:36:42814)\n at I9 (file:///Users/jake.cukjati/.nvm/versions/node/v24.3.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:36:38355)\n at Dh (file:///Users/jake.cukjati/.nvm/versions/node/v24.3.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:36:38283)\n at TC (file:///Users/jake.cukjati/.nvm/versions/node/v24.3.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:36:38137)","timestamp":"2025-09-29T21:56:25.376Z"}]This issue has 3 comments on GitHub. Read the full discussion on GitHub ↗