Any clue why,

grep -B1 "`awk '{print $10}' FILEA`" FILEB

would produce the right output, stand alone and when run in a script, but when in a script results in a;

grep: (*data in field 10): No such file or directory

error? Even though it produces the right output, it ends aborts the scripts after the error....

suggestions?

I am unable to recreate your problem on my system

I'm running a bash terminal in OSX, but the script it's in is csh.