When opening Quickmap, you may get the following error:

Quickmap found a problem

Could not open database
Provider=Microsoft.Jet.OLEDB.4.0;Data
Source=C:\QMap\Data\Sales\QSalesNth.mdb;Jet
OLEDB;Database Password=********;

Additional Information: The Microsoft Jet database engine
stopped the process because you and another user are
attempting to change the same data at the same time.

To fix this, reinstall the data. If that doesn’t work, you may have a permission problem accessing the files.