The "Validate" buttons at the bottom right hand corner of both the source and destination areas can be used to validate DCPs which have the "Validate?" box checked. You can check all the boxes at once by right clicking in the appropriate Area and selecting Validate All.

The validate button calculates a special number called a "hash", based on the number of bytes in each file. This function checks the hash for the new DCP copy against the hash calculated when the DCP was originally created. If the calculated hash and the stored hash are the same, then the DCP has not been altered since it’s creation and is marked with a green OK. If the calculated hash does not match the stored hash, a red Error appears. DCPs or elements of DCPs which have not been validated are marked with a "Not Yet Checked" status.

Common reasons that a file or package would fail validation are:

1. An error occurred during a copy operation somewhere in the life of this DCP. This occurs most often with internet transfers via services like Google Drive or Dropbox, but can also take place whenever a DCP is copied from one place to another.
2. Someone may have tried to alter the contents of the XML files after the package has been created. Changing the text contents of any element in the DCP after it has been created will cause the validation process to fail and is not allowed. If you desire to change the name or any attribute of a DCP, you’ll need to use a DCP authoring tool such as DCP-O-Matic, Open DCP, or easyDCP Creator to modify the package and re-generate the stored hash.

The File menu contains an option called "Verify Drive Format". When chosen, this feature will check the formatting of the current drive selected in the Destination Drive Selector. The verification results are displayed including information about the partition map, filesystem, and inode size (if appropriate). This operation requires that the drive be unmounted and re-mounted.

Once the format of the drive has been verified, a green checkmark will appear next to the drive name in the Destination Panel if the drive adheres to the Digital Cinema Industry Standards. If the drive is not properly formatted, a red X will appear next to the drive selector.

DCP Transfer does not currently allow you to playback your DCP for you to view on your home computer. In order to play your DCP, a DCP specific player from providers like Easy DCP is needed. 

When adding a DCP to the source panel, DCP transfer looks for references in the asset map, CPL (Composition Playlist), and PKL (Packing List) files within your DCP folder. If components of the DCP that are listed in those files are not present in the DCP folder, DCP Transfer will return an error message and not allow that folder to be added to the Source Panel.  This will prevent you from copying an incomplete DCP and sending it off for exhibition. If you downloaded your DCP from a service provider, attempt to download the full package again to see if all of the DCP components are present. If you're still receiving that error message, contact your DCP provider to verify the DCP and resend the package.

This error message is returned when any of a variety of general errors are detected when inspecting your DCP folder. All of the components of the DCP may be present, but something may be wrong with one of the DCP components in the folder. DCP Transfer will not allow that folder to be added to the Source Panel.  This will prevent you from copying an incomplete or corrupt DCP and sending it off for exhibition. If you downloaded your DCP from a service provider, attempt to download the full package again to see if the error occurred during download. If you're still receiving that error message, contact your DCP provider to verify the DCP and resend the package.