Thank you very much for mentioning MPDCenter in this context 
Often the problem of "file not found" occur if people use unofficial files and do not import them into the MPD file. In rare cases MPDCenter might could help to identify the parts current name, but mainly it will be a job for the user to look for the missing part.
I just tried to do that with MPDCenter, but there have to be some wrong code anywhere. Please do NOT try to import unofficial files in this case. I'll try to fix the problem soon.
Often the problem of "file not found" occur if people use unofficial files and do not import them into the MPD file. In rare cases MPDCenter might could help to identify the parts current name, but mainly it will be a job for the user to look for the missing part.
I just tried to do that with MPDCenter, but there have to be some wrong code anywhere. Please do NOT try to import unofficial files in this case. I'll try to fix the problem soon.