Use of uninitialized value in concatenation (.) or string at files.pl line 26, <
FILE> line 6.
Use of uninitialized value in concatenation (.) or string at files.pl line 26, <
FILE> line 15.
Use of uninitialized value in concatenation (.) or string at files.pl line 26, <
FILE> line 24.
Use of uninitialized value in concatenation (.) or string at files.pl line 26, <
FILE> line 33.
Use of uninitialized value in concatenation (.) or string at files.pl line 26, <
FILE> line 42.
Use of uninitialized value in concatenation (.) or string at files.pl line 26, <
FILE> line 51.
Use of uninitialized value in concatenation (.) or string at files.pl line 26, <
FILE> line 60.