Error: COPY failed: file not found
This error matches known, documented patterns with reliable solutions.
Quick Fix (Most Common Solution)
- Ensure file is in build context
- Check .dockerignore rules
Seeing "Error: COPY failed: file not found"? This error can be frustrating, but it's usually fixable. It typically affects your development workflow or system. Below you'll find clear, step-by-step solutions to resolve this issue.
What This Error Means
The file you are trying to copy does not exist in build context.
Frequently documented in developer and vendor support forums.
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Common Causes
- File outside build context
- Path typo
- Ignored by .dockerignore
How to Fix
- Ensure file is in build context
- Check .dockerignore rules
- Use correct relative path
Last reviewed: March 2026 How we review solutions
Optional follow-up
Some users ask whether saving fixes for recurring errors would be useful when the same issue appears again.
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Frequently Asked Questions
What is build context?
The directory you run docker build from.
Check .dockerignore?
Yes, it can exclude needed files.
Also Known As
- Docker container error
- Docker build failure
- Container runtime error
- Docker daemon error
Common Search Variations
- "docker container won't start"
- "docker build error fix"
- "docker image not found"
- "container exited with error"
- "docker daemon not responding"
- "fix docker network error"
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