dbexport madness

Hello, I had to export my database for various reasons ( Seems like Informix's tech support people like it so much, that they tell me to do it for almost everything, even though I've got hundreds of megs and lots of users dependent on the database). Anywaaaayy, since the database is getting so large, I exported it to tape. I had tried to export it to another filesystem, but ran out of space. I then dropped the database, and tried the dbimport. After a few tables, it gave me an error saying tht the number of columns didn't match. So I had to import it from what was exported to the other filesystem and restore whatever was missing. I used the following to export it to tape: dbexport -c maindb -t /dev/rmt/0 -b 32 -s 5000000 -f maindb.imp Any clues, why this would happen? Pete