According to Intuit, Error Code -6073, -99001 can occur when opening the QuickBooks company file (.qbw) in multi-user configurations. This error code has multiple possible causes:
- QuickBooks has opened the file in Single User mode on the computer hosting the company file
- the company file (.qbw) is located in a folder with permissions set to read only
- on a Linux server, more than one set of login credentials are being used to access the shared
For more information on resolving Error Code -6073, -99001 consult this Intuit knowledge base article.