Hello ConTeXist, Some time ago, Hans solved my problem with the splitter. Now I solve correction an error in my module, which to me signaled Pablo Rodriguez. The problem is with jednosloupcovými CSV files, which thus do not contain separators row fields. Pablo say, that CSV files without colon contains separators, because line breaks are separators. Commas—or semicolons—are required when having more than a cell in the same line. For example LibreOffice Calc spares the final semicolon when only the file only contains one column and this behavior seems to be right, according to the RFC4180: Common Format and MIME Type for Comma-Separated Values (CSV) Files. We think that the final comma separator should optional, not mandatory. The following example shows, however, that rfc4180splitter () in onecolumn CSV file fails and falls with an error. Making I'm a mistake somewhere, or is something else wrong with the splitter? Thanx Jaroslav Hajtmar Here is minimal example: \starttext % mycsvfile.txt content one column data without separator: % a % b % c % d % e % f % myothercsvfile.txt content two columns data: % a,1 % b,2 % c,3 % d,4 % e,5 % f,6 \startluacode local mycsvsplitter = utilities.parsers.rfc4180splitter() -- local crap = io.loaddata("mycsvfile.txt") -- crashed (error code attempt to index field - a nil value) local crap = io.loaddata("myothercsvfile.txt") -- work fine local list, names = mycsvsplitter(crap) inspect(list) inspect(names) l = list for i = 1, 6 do context(l[i][1]..', ') end \stopluacode \stoptext