When making changes with Vegas 14 credit roll,the program freezes then crashes when attempting to play. Does not happen on Vegas 13
Not what you probably want to hear, but I have always found Vegas' credit roll to be flaky - it seizes up, it crashes, and there are just too many restrictions on number of font sizes, etc. Instead, I create the credit roll in a word processor, paste it into Photoshop Elements, save it as a jpg or psd, then use pan/crop to do the scrolling. It's just as fast to do, lots more creative options.
Here is a discussion from a few years ago that covered different approaches.
I even edited my posts to get rid of the antiquated mark-up characters.