put together a test case. I can reproduce the failure for dist1, dist2, dist3 and dist5. The full error message is too long for this list to accept, so I'm just posting
and if one or more fail then let me know the failure message and I'll the message of dist1.
Thanks, can I get you to do an SVN update and try the program below? The output will be *very* verbose, so you may need to .zip it up and mail me directly with it, Many thanks, John. #define BOOST_MATH_INSTRUMENT #include <boost/math/distributions.hpp> int main() { double x = 30520, r = 130605, n = 130605, N = 523360, p = 1.315394088731268169855067478460234e-53, q = 1; boost::math::hypergeometric_distribution<> hyp(r, n, N); unsigned x_found = quantile(hyp, p); BOOST_MATH_INSTRUMENT_VARIABLE(x_found); return 0; }