Migration from Sage BV 2014 to Sage 50

Hi, I am an IT guy that is trying to help a friend out.  He currently has BV 2014 limited edition and he is trying to migrate to Sage 50.  I have the migration tool and have done the odbc connection but every time i attempt to migrate i get "the selected database cannot be read"  I am at a bit of a loss because I have tried different paths to the DB which is in the Data folder in the BV folder.  ANY help anyone can give would be greatly appreciated.  I know it is a BTreive Database but really would like to migrate this for him as he is super stressed out about it.