I'm happily using Cassava to parse CSV, only to discover that non-conforming lines in the input data are causing the parser to error out. let e = decodeByName y' :: Either String (Header, Vector Person) chugs along fine until line 461 of the input when "parse error (endOfInput) at ..." Ironically when my Person (ha) data type was all fields of :: Text it just worked, but now that I've specified one or two of the fields as Int or Float or whatever, it's mis-parsing. Is there a way to tell it to just ignore lines that don't parse, rather than it killing the whole run? Cassava understands skipping the *header* line (and indeed using it to do the -by-name field mapping). Otherwise the only thing I can see is going back to all the fields being :: Text, and then running over that as an intermediate structure and validating whether or not things parse to i.e. float. AfC Sydney