When I try to delete a record from a specific table in each of two files, I get an error saying "the operation can't be performed because one or more relationships between these tables are invalid." It doesn't specify which two tables--I'm assuming that the coincidence means it's the relationship between the two tables. I've looked long and hard to find the relationship that's awry, but can't find it. (There aren't many.) Even if I delete the relationship between the tables I still get the error. Any thoughts on how I can troubleshoot this? Can the error come from tables that are not directly related?