When trying to install Quickmap’s aerial photos, you may get this error:

Quickmap Initialisation Error

Could not open database.
Provider=Microsoft.Jet.OLEDB.4.0;Data
Source=\\server\folder\Photos\Image\NZPhoto17.md
b;Persist Security Info=False;

Additional Information: Could not use ”; file already in use.

This error is because the NZPhoto17.mdb file is currently being opened by another user. To get a clue about who this might be, open the NZPhoto17.ldb file in a text file, which is stored in the same folder (which is specified in your error) as the NZPhoto17.mdb file. Note: The list of users in the ldb file may not be current or accurate, and therefore should just be used as a hint as to who might be using it.

Get the other user(s) to close their connection to that database and try again.