You are resuming a previous copy operation and the size of the Source drive is not the same as the original value. This error is most
likely caused by the selection of the wrong Source drive.
You clicked on "Options", "Source Drive Optimization" and chose to use only low-level disk operations. However, the
Source drive did not respond to low-level disk commands.
You chose to copy data to a physical drive that contains an active volume (i.e., drive letter) and the volume could not be dismounted so that copying can
proceed. This error should be followed by a more detailed message.