Hi, I have been searching but the information by way of examples is a little thin on the ground (for me anyway) to make much headway. Simply put I have a flow that decompresses a zipped file (tar.gz) - actually double compressed as this is the format i receive it in. Sometime the file is corrupt which I can detect by following the failure path. However, I wish to put the failures into a 'Failure' folder for checking at a later time. The problem is some file in the flow are regular zip files and i want to ignore those. So I am using scan attribute processor and using regular expressions to match the discitionary. the dictionary text file just contains: /.*.tar.gz/ (do I need the back slashes here?) The properties are set: Dictionary File: D:\NIFI\nifi-1.6.0\Dictionary\Matches.txt Attribute Pattern: .* Match Criteria: At least 1 must match Dictionary Filter Pattern: empty string set Is there something I am missing here? I have tried varies changes to the above but still not getting a match! Thanks, Paul ... View more