can you post your steps to merge individuals so we can try to follow them and see what's wrong? You mentioned you updtated the rogram. Sometimes when a new version is installed, settings may be set back to defaults. Tere may be a step or option that you are missing. If you are doing everything RIGHT, then it's possible there is a minor problem in your database (such as a duplicate record number or a file that needs to be reindexed). You can always try the Project CHECK option, too. Make a backup of the project and library files and run the Check and Repair routine to see how it goes after that.