Hello again, Continuing on with my floating point adventures, I have a question that I hope someone can provide some input on. I'm general idea of what I'm doing the following: double zero = 0.0; notify(fpnotecatch); //Ignore divide by zero note for a moment double pInf = 1.0/zero; notify(0); //Back to default note handler if(isInf(pInf, 1) <= 0 && isInf(pInf, 0) <= 0) exits("Divide by zero did not result in infinity"); The error "did not result in infinity" is always tripped. My understanding is that according to the spec it should have resulted in either + or - infinity. I suspect it's not required as there was a note thrown instead, and I can't think of any reason why you would deliberately ignore the note like I do of the top of my head. Thought I would mention it anyway see what input you guys had. Regards, Rid.