# dpkg-reconfigure prboom
/etc/menu/readme: 1: In: not found
/etc/menu/readme: 2: override: not found
/etc/menu/readme: 3: and: not found
/etc/menu/readme: 5: The: not found
/etc/menu/readme: 6: and: not found
/etc/menu/readme: 8: Please: not found
/etc/menu/readme: 10: For: not found
Execution of /etc/menu/readme generated no output or returned an error.
Cannot open file /etc/X11/twm//system.twmrc-menu.

install-menu: /etc/menu-methods/twm: aborting
update-menus[4372]: Script /etc/menu-methods/twm returned error status 1.
update-menus[4372]: Script /etc/menu-methods/readme returned error status 1.
update-menus[4372]: Script /etc/menu-methods/translate_menus returned error status 1.