Hi, why below script works fine for integers \in [2,53] and does not work for interegers >= 54? Marcin <hansl> function matrix dectobitconvert (const scalar num, const scalar n)     x = num     ret = zeros(n, 1)     i = 1     loop while x>0 --quiet         y = x % 2         ret[i++] =     y         x -= y         x /= 2     endloop     return transp(mreverse(ret)) end function ############################ function scalar bintodecconvert (const matrix mod_struct, const scalar k)     return sum(mod_struct .* 2 .^ seq(k-1, 0)) end function ############################ lenght = 53 # from 54 we get errors bindigit = ones(1, lenght) digit = bintodecconvert(bindigit, lenght) bindigit2 = dectobitconvert(digit, lenght) printf "Control1: %d\n", sum(bindigit - bindigit2) digit2 = bintodecconvert(bindigit2, lenght) printf "Control1: %d\n", digit - digit2 </hansl> -- Marcin Błażejowski