cannot import music to itunes 12
I recently installed/updated to itunes 12, and I can now only import some music from my computer to the new itunes and not others. In previous versions I've had no problem moving files from computer to itunes to ipod. After the update, some files just will not transfer. No error box appears when attempting transfer, they just don't appear in the library.
To be clear, some tracks will transfer and some will not, from the same album. And there is zero indication as to why.