When I open the 2 files as left & right in FileMerge, I can see the things like the following screenshot.
As you can see, it doesn't show contents of the right file.
Before I saw this error, I did these things : Picked some difference things and chose "Choose left" and then Merged the two files.
After I did the things, I could see the error.
I want to know why and resolution.
Thanks.