An internal error occured: referencing a nonexistant file

Hello,
Error received and it deleted about half the images from the set.  Will have to fix that.

It also gave me instructions, so following them...

---------------------------

Error

---------------------------

An internal error occured:



referencing a nonexistant file

Please save your work (use 'save as' to so you don't overwrite things)

and restart Magic Set Editor.



You should leave a bug report on magicseteditor.sourceforge.net/

Press Ctrl+C to copy this message to the clipboard.



Call stack:

[00] 004AC840

[01] 004B5502

[02] 0048331C

[03] 004A23B7

[04] 004AEED6

[05] 004ADE98

[06] 0041A32F

[07] 00526CDD

[08] 0050EE24

[09] 0050F2F8

[10] 0050F384

[11] 005458A6

[12] 00572160

[13] 0056FCCD

[14] 00570DAA

[15] 0055090B



---------------------------

OK

---------------------------


--
Did that, then re-opened file, attempted again and received the error:  

---------------------------

Error

---------------------------

An internal error occured:



referencing a nonexistant file

Please save your work (use 'save as' to so you don't overwrite things)

and restart Magic Set Editor.



You should leave a bug report on magicseteditor.sourceforge.net/

Press Ctrl+C to copy this message to the clipboard.

---------------------------

OK

---------------------------





So then I came here to report it, like it said outdatedly.  
Band-aid: Able to save file by making a new file and copy/pasting all cards to the new file.  However, all the art is still gone.  This also means redoing the set symbol,  keywords, etc.

Well, there you go.  I hope it helps you track a bug.

Thanks,
Rad