I created an Infoset by copying the standard infoset 'CRM_MKTTG_BP_ADDR' using the join operation BUT000 LEFT OUTER JOIN BUT020 INNER JOIN ADRC , BUT000 INNER JOIN BUT100, BUT000 LEFT OUTER JOIN BUT050 . I Created 2 data sources using the same infoset and maintained fm CRM_MKTTG_PF_BP_TAB_TO_CP for one data source without maintaining for the other. When I am creating target group from the attribute list in the web ui I am getting different results for the data sources . The target group for data source with fm is not same as target group for data source without fm. Can you please tell me the difference. What does the fm do? Why am I getting the difference.