Is this due to perl version / build differences?
Correct - our wasn't introduced into perl until 5.6.0. In the mean time you could use vars or just fully declare your variables 
use vars qw/%hash/;

%hash = ( ... );

## or

%Your::Package::hash = ( ... );

[download]
See. perldelta on your windows machine to for more information on the addition of our and any other changes between the two versions.
HTH

_________
broquaint

In reply to Re: using 'our' on Win32 vs Unix by broquaint
in thread using 'our' on Win32 vs Unix by djbiv

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