Factor 0.91 on windows/x86.32
( scratchpad ) ui
<interactive>:1
ui
  ^
Word not found in current vocabulary search path
no-word-name "ui"

The following restarts are available:

:1    Use the word IN: ui HOOK: ui ui-backend ( -- )

Debugger commands:

:help - documentation for this error
:s    - data stack at exception time
:r    - retain stack at exception time
:c    - call stack at exception time
:edit - jump to source location (parse errors only)
:get  ( var -- value ) accesses variables at time of the error
( scratchpad )