You seem to have a badly installed Date::Manip. If you want to see the underlying problem, I bet it will be revealed by changing 
eval "require $backend; $backend->import(); return 1;";

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to 
eval "require $backend; $backend->import(); return 1;" or die $@;

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in the file returned by 
perl -E'require Date::Manip; say $INC{"Date/Manip.pm"};'

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In reply to Re: 5.16 vs Date::Manip by ikegami
in thread 5.16 vs Date::Manip by ChrisDennis

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