Colleagues I've written some code which should extract photos from a directory and a add couple of lines of description to each photo. I'm using a variable (\numberText) as a counter which I was hoping to use with \getfromcommalist[string1, string2,...][\numberText] to add one line of text. However when I try to increment the variable using \numexpr (\numberText=\numberText+1) \relax I get the error "You can't use `\numexpr' in vertical mode". I'm not familiar with \numexpr and there does not seem to be much on the wiki on how to use it. Any suggestions would be helpfull. Here is the code \setupexternalfigures [directory={/Path/to/the/Photos}] \defineexternalfigure[photo][maxheight=0.4\textheight] \define \numberText{1} \starttext \dostepwiserecurse{141}{146}{1}/% //\recurselevel is part of photo filename. See below./ { \externalfigure[sam_0\recurselevel.jpg][photo] \par /% //\recurselevel is part of photo filename/ File Name /Path/to/the/Photos/sam_0\recurselevel.jpg\par \getfromcommalist[some text,another text,even more text,much better text,even better text,the ultimate text][\numberText] \commalistelement\par \numexpr (\numberText=\numberText+1) \relax \par \numberText \par } \stoptext Thanks Keith