Hello, After experiments I wrote below function. Could you verify if function is written correctly for random value from range [min,max) and uniform distribution? double RandomGenerator(const double min, const double max) { assert(min<max); static boost::lagged_fibonacci44497 gen(static_cast<unsigned int>(std::time(0))); static boost::uniform_real<> range(min, max); static boost::variate_generator<boost::lagged_fibonacci44497&, boost::uniform_real<> > generator(gen, range); const double value = generator(); return value; } I have few question related to random library: 1. Is it possibility to write function which will generate numbers from range [min, max] or (min, max) 2. Why generator (boost::lagged_fibonacci44497)is not properly initialized in some default constructor. Without static_cast<unsigned int>(std::time(0)) code generated the same values after every application run. 3. Why when I missed reference "&" in line boost::variate_generator<boost::lagged_fibonacci44497&, application crashes. Is it bug? Best regards, Mariusz