I see the same problem on my win10 with latest eclipse. java.runtime.name=OpenJDK Runtime Environment java.runtime.version=12.0.1+12
Tried on kdiff3 Version 0.9.98 (64 bit) I get same error on file of size 1,99 GB...
I see exact same error but in kdiff3 Version 0.9.97 (32 bit)