Rerunning an ACL join command is much easier than most people realize. And everyone using ACL screws up joining two tables more often than he’ll admit.
It goes like this: You painfully select the primary keys, the secondary keys, the primary fields, and the secondary fields, enter the output table name, and run the join. The join ran successfully, but you forgot to add one primary field or to adjust the options on the More tab. Now you have to do it all again. Or do you?