MS Access 2010: “Cannot open any more databases.”

Question

While struggling with a single legacy MS Access application I faced this weird error:

Cannot open any more databases.

The application makes

Answer 1

The only real way around this problem is to use a temporary set of tables. Insert the results from your unions into temp tables and then use those to limit the number of tables per query. I usually prefix my temp tables with an underscore ( _tmpCustomers ) and then destroy them when I'm done.