Looks like you're using TortoiseSVN. I had the same problems and had to give up with it and switch to using GIT tools (TortoiseGIT and msysgit in my case).
EDIT: forgot to mention that you should either use github.com/mamedev/mame.git or github.com/mamedev/mame/trunk so that you don't download all those useless branches.
Last edited by Robbbert; 02/17/1504:28 AM.
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