I see this too. We will get this error on Linux64 machines periodically and then the next run it will be gone. Happens often enough to be annoying, but not enough to stop productivity.
MATLAB:dispatcher:loadLibrary Can't reload '/afs/localcell/gv/nosys/mathworks/2015a/bin/glnxa64/libmwhgbuiltins.so'.
I see a lot of Mathworks cases with this string, but not many clues. Is it a genuine bug or an OS related issues? Any insights appreciated. Yes, we should probably upgrade versions, but not entirely under my control.