upgrade from 1.8.9 to 1.8.10 symlink failed

I don't know the significance of this error message;

if ! ln -s ${SCRIPT_PATH}/arduino /usr/local/bin/arduino; then
echo "Adding symlink failed. Hope that's OK. If not then rerun as root with sudo."
fi

Running as root sometimes prevents access to directories.

  1. do I need to rerun as root?
  2. do I rerun the entire install.sh OR
  3. do I just run the symlink "n -s ${SCRIPT_PATH}/arduino /usr/local/bin/arduino"
    How do I resolve ${SCRIPT_PATH}

Thanks.