The reason that you want to use an absolute path is that require() will just make an attempt to read the file without checking @INC; however, if you give a relative path, require() will check all the files in @INC, hence the error... 
Can't locate ../../config.pl in @INC

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In reply to Re: Bad Name or Missing @INC entry - "require" path fail. by Khen1950fx
in thread Bad Name or Missing @INC entry - "require" path fail. by punch_card_don

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