Here's the latest: it's working again but I have no idea why!

All I have done today is comment out the lines that set column widths and uncomment them again....and that was 2 and a half hours ago. It didn't make any difference then or during the numerous tests I have done in the time in between up to now (12.00). Now all of a sudden it starts working again. I tried all 3 agents on 2 different copies of the same database and they're all working fine. Gahhhh!!