There are a couple of situations in which tracks may not scan into the library:

 1. MediaMonkey only scans formats that it supports AND that have been 

    enabled for scanning. If you are trying to scan, for example, .shn files,

    MediaMonkey will not find them by default. To fix this you need to

    first install an input plugin for the format in question (if needed),

    and then check off the format in the Add Folders dialog so that it is

    scanned.

 2. If MediaMonkey's Virtual CD or Previews directory is

    configured to use a folder that is within the Path that is normally

    scanned (e.g. if your Music is in /My Music and your Virtual CD is

    configured to be saved to /My Music/Virtual CD/) then MediaMonkey

    scanning operations will not function correctly. The fix is to set the

    Virtual CD / Previews directories to a path that isn't scanned.

 3. Some NAS devices (notably Infrant hardware) seem to stall and/or fail 

    to scan some files due to network-related issues. In such cases, setting 

    the device's TCP MTU to 1492 and disabling jumbo frames on the device 

    may solve the problem.