Hi Corion Sorry the output of $grepstring is
(!/243001/) && (!/454097/) && (!/858035/) && (!/872937/) && (!/427199/)
What i am trying to achieve is a log file filter using a text file for the filter. I am trying to output a filtered log file that doesnt display the lines/error id's that are logged in the text file, so that rather than hard coding it, we can easily add new ones to filter out by adding a line into the file. Hope this helps. Thanks for your help so far