D:\pscrpt\storable>del file.s

D:\pscrpt\storable>perl -MMath::BigInt -MStorable -Mwarnings -le "$mbi = Math::BigInt->new(12345); Storable::nstore(\$mbi, 'file.s'); $ret = Storable::retrieve('file.s'); print $$ret; print ref($$ret);"
12345
Math::BigInt