Hello RegCM users, When I run the model in double nested mode, the following portion in Terrain.x makes me confused. Please give a detailed guideline. When I gave the original number of grid points it is wrong, when I gave two cut from them, wrong too!! No documentation anywhere! Kindly help. Thanks, Mr. Rajesh J. Junior Research Fellow, Department of Atmospheric Sciences, School of Marine Sciences, Cochin University of Science and Technology, Lakeside Campus, Finearts Avenue, Cochin 682016 Phone: 9846812663 e-mail: rajeshj@cusat.ac.in