Posting from the Informix-list

I have an ASCII pipe-delimited file from another database which contains dates that have had no error checking done on them (don't even ask!). The result is that there are invalid dates in the date field. Have any of y'all done any after-the-fact file manipulation to determine invalid dates? What we'd like to do is substitute a single valid default date for all invalids. I'm looking for a 'C', awk or sed program to do this. Thanks in advance, Herb Blacker Database Administrator hhblack@prninc.com