C:\Perl\bwb>perl -v

This is perl, v5.8.6 built for MSWin32-x86-multi-thread
(with 3 registered patches, see perl -V for more detail)

...
C:\Perl\bwb>perl 466922.pl
Warnings on:
Use of uninitialized value in concatenation (.) or string at 2.pl line 10.
Warnings off: