Hi!, I compile this small code with g77 (gcc-3.4) --> no error. But when I run the code I have a "Segmentation fault". Please someone can tell me where is the error? Please note: commenting the call to the subroutine s2 --> no segmentation fault! Cheers Fabio program test parameter(n=3000000) call s1(n) stop end subroutine s1(n) integer m1(n) call s2 return end subroutine s2 return end