Error 75 means there's a permissions issue. It usually happens when the folder for the company copy doesn't have the right access.

1. Access the company data that is on the server pc, for example X:\Demo.
2. Right-click the company and go to Properties.
3. Untick Read only on properties for this company.
4. Select Security and ensure that all the Group or User names have full control permissions.
5. Select Apply.

    

Create the copy company manually.