Just to make sure I'm clear on your question, you go through the following steps.
With your database open you:
Click on the File menu
Click on the Manage... option
Click on the Database option
When the window opens you click on the Relationships tab at the top of the window
There is a table called Accounting and there is a table called Production.
You have joined these two tables by a field value that is the same in both tables.
Is this accurate?
"no fields listed". Did you mean no tables listed?
If you open the Production file, open Manage | Database and select the Tables tab, are there any tables? That may sound crazy, but maybe Production is an interface file and it's tables are all from another file, a data file for which Production is the front end. If so, there will be no tables in Production to which you can link a table occurrence, you'll need to open the other file that actually has the tables in it.