The other solutions are implementing finding the path of script from $0. There is a module, FindBin, that does this and handles all the edges cases. It is perfect for using it with "use lib" to set @INC. You don't even need a BEGIN block. 
use FindBin;
use lib "$FindBin::Bin/../lib";

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In reply to Re: Using modules with relative paths by iburrell
in thread Using modules with relative paths by Hena

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