Hi, thanks for reporting, tracked as https://www.ventismedia.com/mantis/view.php?id=15572

There is EPathTooLongException so it seems that MM5 has an issue with too long paths or cannot automatically short them.
Workaround for you is to set the mask to create path+filename shorter than 260 chars.

With last MM5 built 5.0.0.2167, crash when ripping CD.

ID error DD4DF68B
(Can't tell if sending of bug report is successful, because MM gets stucked sending message)
Also ID error DD4D9AA9