FoundationAgents/OpenManus · error · FileNotFoundError

Source file not found: {src_path}

Error message

Source file not found: {src_path}

What it means

Raised as FileNotFoundError by DockerSandbox.copy_from (app/sandbox/core/sandbox.py:311) when the underlying Docker archive fetch raises docker.errors.NotFound — the source path does not exist inside the container. This is the pre-extraction existence check: it fires before any tar processing (unlike errors 33–35 which occur after a successful fetch).

Source

Thrown at app/sandbox/core/sandbox.py:311

                    if os.path.isdir(dst_path):
                        tar.extractall(dst_path)
                    else:
                        # If destination is a file, we only extract the source file's content
                        if len(members) > 1:
                            raise RuntimeError(
                                f"Source path is a directory but destination is a file: {src_path}"
                            )

                        with open(dst_path, "wb") as dst:
                            src_file = tar.extractfile(members[0])
                            if src_file is None:
                                raise RuntimeError(
                                    f"Failed to extract file: {src_path}"
                                )
                            dst.write(src_file.read())

        except docker.errors.NotFound:
            raise FileNotFoundError(f"Source file not found: {src_path}")
        except Exception as e:
            raise RuntimeError(f"Failed to copy file: {e}")

    async def copy_to(self, src_path: str, dst_path: str) -> None:
        """Copies a file to the container.

        Args:
            src_path: Source file path (host).
            dst_path: Destination path (container).

        Raises:
            FileNotFoundError: If source file does not exist.
            RuntimeError: If copy operation fails.
        """
        try:
            if not os.path.exists(src_path):
                raise FileNotFoundError(f"Source file not found: {src_path}")

View on GitHub (pinned to 52a13f2a57)

Solutions

1. Verify before copying: run_command(f"test -e {src_path} && echo ok").
2. Use the same absolute container path that the producing command wrote to.
3. Check the producer's exit code/output before fetching artifacts.

Example fix

# before
await sandbox.copy_from("/workspace/build/out.bin", "./out.bin")

# after
if "ok" in await sandbox.run_command("test -e /workspace/build/out.bin && echo ok"):
    await sandbox.copy_from("/workspace/build/out.bin", "./out.bin")

exists = (await sandbox.run_command(f"test -e {shlex.quote(src)} && echo 1")).strip() == "1"

try:
    await sandbox.copy_from(src, dst)
except FileNotFoundError:
    log.warning("artifact %s missing in container — producer failed?", src)

When it happens

Trigger: copy_from of an output file/directory that was never produced; typo in the container path; relative path resolved under work_dir where the file is not; file deleted by a cleanup step inside the container.

Common situations: Copying build artifacts after a build command failed; wrong work_dir assumption when the command ran in a different CWD; container restarted/reset between write and copy.

Related errors

• File not found: {path}
• Source file is empty: {src_path}
• Source path is a directory but destination is a file: {src_p
• Failed to extract file: {src_path}
• Failed to copy file: {e}

AI-assisted analysis of FoundationAgents/OpenManus@52a13f2a57 (2026-08-15). Data as JSON: /api/errors/19e70a990e1a0e9a. Report an issue: GitHub.