error report recieved when copying album art

[andrew]

MusicBee v3.1.6275.38881 (Win10.0), 6 Apr 2017 7:56:

System.ArgumentException: An item with the same key has already been added.
   at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)
   at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
   at #=quhSaIHMn0_LwiORjR0NCbzMfOZyXT0bBRvSHmmMDkv0=.#=qe3DD4q2HW_IWW3NshCog1cVNPKG254iIFrquL5Sz7eA=.#=qa7bBzUTE6rPlig5K03pIw380IrYauWSiGfCJcbBsLKE=(IEnumerable`1 #=qS4yMZnP9GK8D0fBWPBhu1Q==)
   at #=qr3DrQbEIXW7ArEV5Z9_EsbaBZea9rRQmI$J$wbJAA$0=.#=qz19n9MRYwQnRw$KMFgefOngXdDx9Z3K1wfhSwqX0IMc=.#=qBoS7BWzk1w1_W0zFZDV2Yg==(IList`1 #=q7_CiDS4UWyfl1yWyTAW2Gg==, Boolean #=qlZkpclnI5xoT$S5L08S1hQ==)
   at #=qr3DrQbEIXW7ArEV5Z9_EsbaBZea9rRQmI$J$wbJAA$0=.#=qxuuTWFnT3O9eAoj1dsIaOQ==(IList`1 #=qIgxDvAk_vA8uUGY3OovatQ==, TagCode #=q7PrLkixtvRcZEjdtKGKKKQ==)
   at MusicBee.MusicBeeMain.#=qDq2_AXrsOqo1uRNcP3IrCA==(IList`1 #=q5Uksgel9oWQ7xw6bfvHx9A==, TagCode #=qqfRbsZbj3JtxOMWDhWgSwg==, Boolean #=qXj7xHQqA4$QqY48eaKLUXuyNTUmbKWxPuGOTxqfTQTI=)
   at MusicBee.MusicBeeApplication.#=qiD5ZRl9FcrXwgKTqDEd9_ucbHY7hbDzZnpJoOhJiWCk=(IList`1 #=q5zexyFomI1X78p0k_9$Zhg==, TagCode #=qXtuxKpThkucDByn2QzwJKw==, Boolean #=qDNRfJ0jUtWw7hozhjYaV40hqCMaGo291lhGUnu5G09w=)
   at MusicBee.MusicBeeMain.#=qz3ICvJ3OzOqjcQpLibQVIGkcGkQbyV9LdSALiyT5Osw=(#=qbTukElaOWP9xa66rKe7RhW$QRlTq06o_gHaqDF_W$BM= #=qBOt2X4LNsy01K5oVaGFIUw==, Boolean #=qT4jk78OoAO1COctnQLaufw==)
   at MusicBee.MusicBeeMain.#=q2oCZg2IMOqB3Vxvs2MmLTQ==(ApplicationCommand #=qmXyDI8Yar7eDEHFGOZ4Upw==, Object #=qddt0grI9DZq1huraj7PfjA==, #=q4IaRbMlzYzjAFKXF2zgOSQPgQID95x8n24WvVVAQoX4= #=qk9zeoOm4aZDO9dxLBWHxFg==)
   at MusicBee.MusicBeeApplication.#=qTfMDPW4idx2JGKKZBPfdlA==.#=qg6x1jErN0dQLTlEAEjf0Pg==(ApplicationCommand #=qSwwUKfwfYxxg7Wv3a8TRSA==, Object #=q$EILvQMNaS1lHb3a5_XOqg==, IList`1 #=qBVeSyabrSzzFuD4i6ozeYA==)
   at #=qj_uMhRZcpEHQc_Fm5b76Q3cxuFlcO0x5Z_3LDRaVp3U=.OnClick(EventArgs #=q8Fs7_eMvBmpHqkt77qgvEA==)
   at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e)
   at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e)
   at System.Windows.Forms.ToolStripItem.FireEventInteractive(EventArgs e, ToolStripItemEventType met)
   at System.Windows.Forms.ToolStripItem.FireEvent(EventArgs e, ToolStripItemEventType met)
   at System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea)
   at System.Windows.Forms.ToolStripDropDown.OnMouseUp(MouseEventArgs mea)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at System.Windows.Forms.ToolStrip.WndProc(Message& m)
   at System.Windows.Forms.ToolStripDropDown.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

[Steven]

i have made a change for the next v3.1 update

[Steven]

http://musicbee.niblseed.com/V3_1/MusicBee31_Patched.zip

[andrew]

thank you 

[andrew]

after applying this patch my previously perfectly ordered library seems to have forgotten the alphabet when listing artists and has split artists into  multiple artists even though I have ensured the artist name is the same by copying the same name to multiple files.

http://imgur.com/gallery/a6qtU

[Steven]

check the sort artist tag values