The Stepper example on the wiki, from which the following snippet comes,

\usemodule[pre-60] % use the stepper
\setuppapersize[S6][S6]

\defineoverlay[invoke] [\overlaybutton{InvokeStepper}]
\setupbackgrounds[text] [background=invoke]

\setupinteraction[state=start,click=off]

\starttext
ex nihilo
\stoptext

fails here with the following error:

! LuaTeX error ...eXt-beta/tex/texmf-context/tex/context/base/lpdf-mis.lua:146: attempt to call upvalue 'pdfaction' (a nil value)

stack traceback:
...eXt-beta/tex/texmf-context/tex/context/base/lpdf-mis.lua:146: in function '?'
...eXt-beta/tex/texmf-context/tex/context/base/lpdf-ini.lua:700: in function 'run'

...eXt-beta/tex/texmf-context/tex/context/base/lpdf-ini.lua:722: in function 'finalizepage'
[string "\latelua "]:1: in main chunk.

Though I am using the latest beta, I do not think this problem caused by changes in the latest release. I have attached the log file for those who are interested. Any suggestions how to rectify this problem would be much appreciated.

With kind regards,

Michael Guravage