Hi Miles,

I have been trying to do the iDMRG calculation using the idmrg function.

But every time the calculation stops at step 3 with the following in the terminal

iDMRG Step = 3, N=12 sites

Initial energy = -9.74864055676848728638

area(phi.front().inds()) = 81

A.size() = 45369

From line 99, file /home/sam/Desktop/itensor/itensor/itensor/eigensolver.h

davidson: size of initial vector should match linear matrix size

davidson: size of initial vector should match linear matrix size

Aborted (core dumped)

I don't know if it is a problem in my code or not.

Many thanks in advance.

Sam