Hi, I had previously posted some questions and I appreciate the previous reply from Matthias Troyer.I'm using ALPS 1.3.5 on Linux currently. I'm still learning about ALPS and DMRG and I'd just like to clarify a few more questions:1. Is it possible to get the ground state wavefunction using the simple DMRG application for a heisenberg spin chain? As far as I know, a spin model needs to be specified but for the simple DMRG it is non-interacting.. But I don't get the relationship to specification of a model.2. Is it possible to get the ground state wavefunction using the full DMRG application? I am thinking of reconstructing the wavefunction from the truncated density matrix. As far as I have seen in the code, the truncation of the wavefunction is done by first reordering the basis, then resizing the vector. Am I right on this? If so, is there any way which I could reconstruct the wavefunction in the original basis of the spins of a heisenberg spin chain? Thanks in advance. Regards,YQ