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SkillsWorkflowsToolsFix ErrorsGuides

Error Library

Overview
System & Access
Context & Logic
Workflow
errors

Error Code Library

The definitive dictionary of Claude Cowork error messages and fixes.

System & Access

Permission Denied / File Access

Claude cannot read or write to a specific folder. Usually caused by macOS privacy settings.

macOSPermissions

Tool Execution Failed (127)

"Command not found" errors when running shell commands.

ShellPath

MCP Connection Failed

Trouble connecting to local servers via Model Context Protocol.

MCPNetwork

Context & Logic

Context Window Exceeded

Request too large for the token limit (200K/1M).

TokensLimits

Stale Context Warning

When Claude forgets previous instructions or file states.

MemoryDrift

Hallucinated File Paths

Agent tries to edit files or folders that do not exist.

Hallucination

Workflow & Runtime

Git Merge Conflict Loop

Agent gets stuck in an endless loop trying to resolve git conflicts.

GitLoops

NPM Dependency Hell

Broken package.json or version conflicts after install.

NPMNode

Sub-Agent Timeout

Parallel sub-agents fail to return results.

AgentsTimeout

Rate Limit Exceeded (429)

Too many requests or daily quota exhausted.

APIBilling
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