Error message: Open a new tab when "show files w/ small art" is processing

[theta_wave]

The error below occurs when attempting to open a new tab when [Tools > Tagging Tools > Other 'Files to Edit' Filters > Show Files with Small Artwork] is processing the library.

MusicBee v3.0.5895.34151 (Win6.1), 21 Feb 2016 13:55:

System.ArgumentNullException: Value cannot be null.
Parameter name: collection
   at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
   at MusicBee.MusicBeeMain.#=qf3XOhjZB_0YZtSZWnTKm1bLgRQ56HtGRqCxBK3p99TI=.#=qKWaqI59kT7w0rcMqQx3WqoQOaKWmTlwjrHk080qt1LM=(Object #=q$eZcbl9TX0OyiuiAKL6dMg==)

[Steven]

what is displayed in the main panel at the time you run this command?