This action cannot be performed because the required table is missing
I have a very simple, flat FileMaker database into which I am trying to import an Excel file. There are no scripts in this database and no relationships set up. I am trying to import a list of students updating using the student ID and each time I get this message: This action cannot be performed because the required table is missing.
This happens in FileMaker 11 and FileMaker 12 on a Mac. I have never seen this before and I don't know how to solve it. Please help.