owasp-amass/amass · error

failed to initialize command for %s

Error message

failed to initialize command for %s

What it means

startEngine builds the engine command with initCmd(p) using the resolved executable path. If initCmd returns nil (it could not construct a valid exec.Cmd for that path), this error names the path and aborts engine startup.

Source

Thrown at cmd/amass/process.go:41

	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
	defer cancel()

	return c.HealthCheck(ctx)
}

func startEngine() error {
	p, err := os.Executable()
	if err != nil {
		return fmt.Errorf("failed to get executable path: %w", err)
	}
	if p == "" {
		return fmt.Errorf("executable path is empty")
	}

	cmd := initCmd(p)
	if cmd == nil {
		return fmt.Errorf("failed to initialize command for %s", p)
	}
	cmd.Stdout = io.Discard
	cmd.Stderr = io.Discard
	cmd.Stdin = os.Stdin

	cmd.Dir, err = os.Getwd()
	if err != nil {
		return err
	}

	return cmd.Start()
}

View on GitHub (pinned to 79299dce87)

Solutions

1. Verify the path p is a valid, executable file (os.Stat, exec.LookPath(p)).
2. Check initCmd's internals for why it returns nil and fix the inputs it depends on (name/args/environment).
3. Reinstall or restore the amass binary at a stable location and re-run.

p, _ := os.Executable()
if fi, err := os.Stat(p); err != nil || fi.IsDir() || fi.Mode()&0111 == 0 {
    return fmt.Errorf("path %s is not an executable file", p)
}

if err := startEngine(); err != nil {
    if strings.HasPrefix(err.Error(), "failed to initialize command for") {
        log.Fatalf("bad engine path: %v", err)
    }
}

When it happens

Trigger: initCmd returning nil because the executable path is unusable or the command construction (name/args) failed inside initCmd's internal checks.

Common situations: Binary rebuilt/renamed between health-check and relaunch; running through wrappers (symlinks, shim scripts) that confuse path resolution; permission-bit stripped from the binary.

Related errors

• the Amass engine did not respond within the timeout period
• failed to get executable path: %w
• executable path is empty
• failed to cast the DomainRecord
• failed to cast the IPNetRecord

AI-assisted analysis of owasp-amass/amass@79299dce87 (2026-09-06). Data as JSON: /api/errors/7088c6f3416cfb96. Report an issue: GitHub.