If the file you want to convert is open in an earlier version of FileMaker Pro (for example, an Inventory.fp7 file is open in FileMaker Pro 11), close the file in the earlier version.
Try recovering the original file using your version of FileMaker Pro. Then open the recovered file with that same version, close the file, and then try converting it with FileMaker Pro 12.
Passwords are case-sensitive in FileMaker Pro. Make sure you enter your password exactly as it was created in a previous version of FileMaker Pro. If you are not the owner of the file or the database administrator, consult your database administrator for password information.
You cannot open a snapshot link that was created using FileMaker Pro 11. You must convert the database from which the records were found and then re-create the snapshot link. See
Saving and sending records as a snapshot link.