https://www.tntware.com/tntconnect/help/faq_en/pages/how-do-i-get-past-quot-cannot-open-file-quot-z-volumes-quot-sharing-violation-quot.aspx(Disregard this if you're on a PC.) If you're using TntMPD for Mac, take note that it generally is only able to open your database if it's on your main hard drive ("Macintosh HD" as it's often called). So if you're trying to open a database on an attachedenCommunityServer 2008.5 SP2 (Debug Build: 40407.4157)