[Greg Jones]

Yes, I tried running the 'missing value' parameter myself yesterday and it would not work. I also tried setting the value to "" and that did not work either. Out of curiosity I also tried setting the value to an alpha character, and the script aborted with an error that the field cannot be set to non-numeric. Strangely enough, one can enter an alpha character in the column field for time (but not in the info window), the field is set to blank, and the record is reset to unestimated.