Ah... 9223372036854775807 is the timestamp value assigned to the "accountExpires" attribute in Active Directory when any account is set to "Never Expire". It works fine on Linux/Mac but not on Solaris. I guess I'll just convert that timestamp to something like 12/31/2099 23:59:59 before I run the Time.at. Matt ----- Original Message ----- From: "Brian Candler" <b.candler / pobox.com> To: "ruby-talk ML" <ruby-talk / ruby-lang.org> Sent: Tuesday, August 10, 2010 7:53:24 AM Subject: Re: Error: Bignum too big to convert into `long' Try your example values in irb: irb(main):003:0> (9223372036854775807 - 116_444_736_000_000_000) / 10_000_000 => 910692730085 irb(main):004:0> Time.at(910692730085) RangeError: bignum too big to convert into `long' from (irb):4:in `at' from (irb):4 Time.at expects number of seconds since Jan 1, 1970. The value you have given it is some time in the year 30,828 :-) I suspect either your epoch or your multiplier is wrong. B. -- Posted via http://www.ruby-forum.com/.