Dear All, I use 'dtime' in my inversion routine to calculate the cpu time spent for each step on SUN Ultra 5. But when I recompile the program in home by g77 on Solaris 7 on Intel, the g77 did not recognize the SUN Solaris Sparc Fortran 77 SC4.2 function 'dtime'. Does anybody know that is there a equivalent time function in g77? Thanks in advance, Hai-xu