Hi, Oberon.Mail.Mod has Files.WriteLInt(r, SIGNED32(0FFFFFFFFH) and d # 0FFFFFFFFH. Is the notation OK for 32 and 64 bit machines? Is there a better notation? Thx, ... P.L. -- VoIP: +1 604 670 0140 work: https://en.wikibooks.org/wiki/User:PeterEasthope