C:\Documents and Settings\Owner\Desktop>perl n13.pl
not ok 1 - some test
#   Failed test 'some test'
#   at n13.pl line 7.
Usage: Math::Int64::_string(self, other, rev) at C:/perl512/lib/Test/Builder.pm
line 876.
# Tests were run but no plan was declared and done_testing() was not seen.

C:\Documents and Settings\Owner\Desktop>