Dear listers, I am using the DSSAT35. In the main menu, when click >background->fields item, it is required to "input the run-time module path: " . Question is what module it is and where it is located. Please tell me how to handle with this problem. When click >Tools\Op.system, a screen of disk management appears correctly. But, when execute any command, e.g. 'clr' screen, the screen does not display correctly. My PC is a notebook of DELL CPx 750. The OS is Windows2000 (English) Can you help me? Thanks. Y. Luo