Dear all, There are a few lines as follows in the facade_5.cfg file, which locates in /opt/esru/espr/training/cg_ctl/daylit_coef/cfg/, *tdf dec94.tdf # tdf item id, item type, <related zone> diff-5 DIFHSLT ALL glob-5 GLOHSLT ALL * end tdf what function the above lines has? thank you in advance. Qiu