Dear Aaron, To be honest, I haven't got the fogiest.
On other architectures, it works fine. And test5 hasn't been individually changed since v1.8 was released (24 Aug 2016): https://github.com/SebWouters/CheMPS2/commits/master/tests/test5.cpp.in https://github.com/SebWouters/CheMPS2/releases Could it be that it was an individual accidental seg fault, which doesn't re-occur upon running another time? Best wishes, Sebastian
