Problem using nested \processcommalist and \startparagraphs columns

Problem using nested \processcommalist and \startparagraphs columns

[Rik Kabel]

I am having a problem with the combination of nested \processcommalist 
and \startparagraphs columns and I do not see any obvious issues.

Run the example below with "--mode=unroll" and it works fine.

Run it without that mode, and it fails.

Remove the lines tagged "problematic" and run it without that mode and 
it completes, although without the columns.

     % macros=mkvi
     \defineparagraphs  [Col] [n=3]
     \setupparagraphs   [Col] [1] [width=.31\textwidth]
     \setupparagraphs   [Col] [2] [width=.31\textwidth]
     \setupparagraphs   [Col] [3] [width=.31\textwidth]
     \starttexdefinition doOuter #OUTERVALUE
             \define\Outer{#OUTERVALUE}
             \startparagraphs[Col]      %%% problematic
             \doifmodeelse{unroll}
                 {\startparagraphscell
                      \Outer XX
                  \stopparagraphscell
                  \startparagraphscell
                      \Outer YY
                  \stopparagraphscell
                  \startparagraphscell
                      \Outer ZZ
                  \stopparagraphscell}
                 {\processcommalist[XX,YY,ZZ]\doInner}
             \stopparagraphs            %%% problematic
     \stoptexdefinition
     \starttexdefinition doInner #INNERVALUE
              \startparagraphscell      %%% problematic
                  \Outer #INNERVALUE \par
              \stopparagraphscell       %%% problematic
     \stoptexdefinition
   \starttext
       \startsubject[title={Nested processcommalist}]
       \processcommalist[aa,bb,cc,dd,ee]\doOuter
       \stopsubject
   \stoptext

Any assistance that can be provided would be much appreciated.

-- 
Rik


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