Baba says:

The hash-bang line needs to be the first line in the script. Get rid of the #fileformat=unix. Also make sure your script is executable (chmod +x scriptname). This works:

#!/bin/bash
grep -iv '#$'

ljkyser says:

1st off you need #! /bin/bash as the first line in your script.

Then ‘#$’ has no meaning in the shell pantheon of parameters. Are you searching for a ‘#’ at the end of the line? (That is OK). But if you meant ‘$#’ but then $# is the parameter that means the ‘number of arguments on the command-line’

Generally, piping a list of files to a script to acted on would have to be accomplished with further wrapper. So a bare-bones, general solution to the problem you pose might be :

$cat scriptname
#!/bin/bash

while read fileTargs ; do
   grep -iv "${@}" ${fileTargs}   # (search targets).
done

called as

ls | scriptname srchTargets

I hope this helps.