Maybe you can think of your capture problem in a different way then. Most likely, you want everything after the last "path separator" up until the double quotes:

TEXT:\s+".*?[\\/]([^\\/"]+)"
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The filename can contain everything except a path separator (\ or /) and double quotes, and must be followed by double quotes.

Thanks This worked for me .*TEXT:\s+".*?[\\\/]([^\\\/"]+)"

somehow it is not working for me or am i doing something wrong :( used it like this  .*TEXT:\s+".*?[\/]([\/"]+)" as \\ was not recognized and for my input TEXT: "C:\temp\test äbc.txt" there were no matches found

You're missing the negation ^ in the character class. Also, you're using forward slashes in the regex, but backslashes in the string. Moreover, I'm not sure the ? is needed.

#! /usr/bin/perl
use strict;
use warnings;

use utf8;

my $input = 'TEXT: "C:\temp\test äbc.txt"';

print $input =~ /.*TEXT:\s+".*[\\]([^\\"]+)"/;
#                            ~  ~   ~ ~
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map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]