search for: name_of_the_c_function

Hello to everyone! I use .Call to call a C function without arguments wich calls a fortran optimization package. My C function uses others C and Fortran functions and it works fine when I call it from a main() in a C program. But when I call it from R with .Call("name_of_the_c_function"), R gives me some weird output. This weird output is a worng answer to my optimization problem (sometimes after thousands iteractions, what does not occur when called from C) or a segmentation fault error. The kind of output depends on the machine I am using. At home I got a segmentation faul...