In Linux, my favorite merge tool is Meld, and I\'ve had no problems using or configuring it to work with Git. However, in Windows it has been a different story.
Fir
After trying all of the above, setting Meld to run as administrator worked for me.
Run this program as an administrator checkboxThe errors I received referenced temp files like c:\windows\temp\meld-*, which were not being created. Elevating Meld's permissions seems to do the trick as it now works with both git difftool and running manually within Meld.