Server Script

So I'm trying to implement a server script, and I'm getting some errors
with the beginning of my code, specifically the section that ties to Xymon.

HOSTTAG="tag"
COLUMN="$HOSTTAG"

# Here is where I get my first error. Directory apparently does not exist.
However, later in the script
I source from a similar location and all works fine. I have manually
checked, this location does exist.
$XYMONHOME/server/bin/xymongrep "$HOSTTAG" | while read L
do