I have a number of slides using \...framedtext blocks to break the slides into panes within a TABLE environment (TMI: not in MWE; merely my justification for writing the wrapper macros). When the TABLE macros are invoked explicitly it all works fine and produces a suitable single-cell table with "quux blech baz bar foo" framed; when embedded in macros (whether defined by \def, \unexpanded\def, \define) then it fails with the error "The file ended when scanning an argument. => fatal error: return code: 256. A previous question on the topic seemed to indicate that TABLE was suitable, so I figure that something subtle is wrong as I've invoked the embedded TABLE macros. Any suggestions?

Many thanks,

 ---K

MWE: this code fails if the \...PaneSlide block is uncommented, succeeds if commented out.

\define\startPaneSlide{\bTABLE}

\define\startPaneRow{bTR\bTD}

\define\stopPaneRow{\eTD\eTR}

\define\stopPaneSlide{\eTABLE}

\starttext

    \bTABLE

        \bTR\bTD

            quux blech baz bar foo

        \eTD\eTR

    \eTABLE

    \startPaneSlide

        \startPaneRow

            foo bar baz blech quux

        \stopPaneRow

    \stopPaneSlide

\stoptext