Are you sure it's resetting because of an MCLR reset? Could it be a brownout reset, or something like that? How do you know the chip is resetting at all? Josh -- A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. -Douglas Adams Tuprul G\GL\ wrote: > I'm having some problesm with 18F458 ,First I thought it is because of PIC C > compiler's float library but then realised that it's not a software problem > .}t is because of unstable behaviour of MCLR pin. > Altough I pulled up that pin sometimes it resets. > Has anyone saw this touble before? -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.