Microsoft Windows literally has tens of thousands of different error codes and messages. You may find reference to an Microsoft Windows Error Code number in WholesaleBackup logs. Below are links to Microsoft's description of each.
Microsoft System Error Codes (0-499)
Microsoft System Error Codes (500-999)
Microsoft System Error Codes (1000-1299)
Microsoft System Error Codes (1300-1699)
Microsoft System Error Codes (1700-3999)
Microsoft System Error Codes (4000-5999)
Microsoft System Error Codes (6000-8199)
Microsoft System Error Codes (8200-8999)
Microsoft System Error Codes (9000-11999)
Microsoft System Error Codes (12000-15999)
Please see this article on accessing files and folders on network shares and mapped drives for resolution to common WholesaleBackup issues as well as using Google or Bing to find more detail on how to resolve MSDN errors.