SQL*LOADER

Is it possible to test for a blank line in a data file and NOT upload it? For example, I may have a .dat file like the following:

A	100
B	200
	<---- may be a cr/lf in any column, not always the first
C	300

I have tried using the WHEN clause combined with the BLANKS operator like this:

WHEN (1:80) <> BLANKS

to no avail. Received on Tue Feb 04 1997 - 00:00:00 CST