Dear Michele,
Thanks for your help. I installed the latest trunk version 7593 (I had 7592). Sorry for my stupid mistake, I changed of course to "inhomogeneous chain lattice". sparsediag and fulldiag are working. But, unfortunately, mps_optim still produces the error message:
Exception thrown: Cannot evaluate x
Best regards
Dominique
Dear Dominique,
The problem in the MPS codes has been fixed in revision 7593. Just upgrade to the latest /trunk version to get the fix.
Thanks a lot for reporting it. During the implementation we forgot about inhomogeneous lattices.
Note that your parameters seem to work with the sparsediag application, once one actually specifies an inhomogeneous lattice. In your XML parameters you specified the conventional ?open chain lattice?.
Best regards, Michele