I tried this formula : 'INV01 Inventory Ordering'.Safety Stock exception count[SUM: 'SYS08 SKU Details'.Country, SUM: 'SYS08 SKU Details'.Product Family]. But i don't understand. Normaly INV01 does'nt have geography as dimension, so the data displayed at INV01 (source module) is at All Region Level, while INV02 (target) is at country level. So normally, the maaping is used with a LOOKUP and not a SUM. When i try to do it with a lookup, the system says that there is a mapping error. Could you help me ?