You can probably access your global %line as %main::line. Another (better) way would be to declare them with our:

our %line = ( 1 => 2, 3 => 4 );
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However, if you really want to use global variables, you should put them into some namespace other than the default, for example like so:

%MyGlobals::line = ( 1 => 2 , 3 => 4 );
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or so

{ package MyGlobals;
our %line = ( 1 => 2 , 3 => 4 );
}
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Try one of these, dropping use strict; is not a good idea..