Dear all,

I tried to find a minimum of a function of 3000 variables with this routine (I used powell of F77). When I run the program, it stops and I get a message that the problem comes from the line:

elseif((u-ulim)*(ulim-cx).ge.0.d0) then

in mnbrak(ax,bx,cx,fa,fb,fc,func)

I didn't find an explicit error!!

can anyone suggest to me some solutions?

Thank you