I’ve compiled a modified version of FAST with the G95 compiler. As mentioned by other users, it’s slow compared to Compaq Visual Fortran (CVF). My current problem is with simulations not working with dynamic inflow (power drops off). When I had access to CVF, I had the same modified program working with dynamic inflow. The program has been modified to compile with G95, but I cannot find a change that makes any difference. Any suggestions out there?