if progVers == "(devel)" { // avoid special characters in created file names
		progVers = "devel"
	}
	logBase := strings.ReplaceAll(
		fmt.Sprintf("%s-%s-%s-%4d%02d%02d-%d.log", prog, progVers, goVers, year, month, day, os.Getpid()),
		" ", "")
	fname := filepath.Join(debugDir, logBase)
	if _, err := os.Stat(fname); err == nil {
		// This process previously called upload.Run
		return nil, nil
	}