Hi all: When I define a variable which will sum the fields in the detail band, I find that there is no increasement definition that starts with detail, it must be increased by group ???? I am not sure I've made myself understood. As a result, the following text is an example: ------------------------------------ F1 F2 Group Header ------------------------------------ a 1 b 5 Detail Band c 3 ------------------------------------ Sum:9 Group Footer ------------------------------------ How can i get the sum number? Any suggestion will be appreciated!