Dear Alps users,

  I am totally new to ALPS code using quantum monte carlo. I have started to use this code for few small purpose like magnetic suceptibility vs temperature for various spin lattice models.

Currently I have used ALPS code for calculating susceptibility for ising type S=3/2 Kagome lattice. I found in the lattice library that Kagome lattice is defined. So in the tutorial mc-02-susceptibilities/ I changed tutorial2d.py by editing

#prepare the input parameters
parms = []
for t in [0.05, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.25, 1.5, 1.75, 2.0]:
    parms.append(
        {
          'LATTICE'        : "Kagome lattice",
          'MODEL'          : "spin",
          'local_S'        : 1.5,
          'T'              : t,
          'J'             : 4.2 ,
          'THERMALIZATION' : 5000,
          'SWEEPS'         : 50000,
          'L'              : 60,
          'ALGORITHM'      : "loop"
        }
    )

Then I changed the same way param2d file and ran the alpspython tutorial2d.py and I got strange error

/usr/local/lib/python2.7/dist-packages/matplotlib/style/core.py:203: UserWarning: In /usr/share/matplotlib/stylelib/classic.mplstyle: text.dvipnghack is obsolete. Please remove it from your matplotlibrc and/or style files.
  warnings.warn(message)
loop parm2d.in.xml
ALPS/looper version 3.2b12-20100128 (2010/01/28)
  multi-cluster quantum Monte Carlo algorithms for spin systems
  available from http://wistaria.comp-phys.org/alps-looper/
  copyright (c) 1997-2010 by Synge Todo <wistaria@comp-phys.org>

using ALPS/parapack scheduler
  a Monte Carlo scheduler for multiple-level parallelization
  copyright (c) 1997-2016 by Synge Todo <wistaria@comp-phys.org>

based on the ALPS libraries version 2.3.0
  available from http://alps.comp-phys.org/
  copyright (c) 1994-2016 by the ALPS collaboration.
  Consult the web page for license details.
  For details see the publication:
  B. Bauer et al., J. Stat. Mech. (2011) P05001.

[2018-Aug-03 14:02:51]: starting scheduler on cces-System-Product-Name
  master input file  = /home/cces/kagome-alps/mc-02/parm2d.in.xml
  master output file = /home/cces/kagome-alps/mc-02/parm2d.out.xml
  termination file   = [disabled]
  total number of thread(s) = 1
  thread(s) per clone       = 1
  number of thread group(s) = 1
  auto evaluation = yes
  time limit = unlimited
  interval between checkpointing  = 3600 seconds
  interval between progress report = 600 seconds
  interval between vmusage report = infinity
  task range = all
  worker dump format = hdf5
  worker dump policy = running workers only
[2018-Aug-03 14:02:51]: task status: total number of tasks = 15
  new = 15, running = 0, continuing = 0, suspended = 0, finished = 0, completed = 0, skipped = 0
[2018-Aug-03 14:02:51]: starting 1 threadgroup(s)
[2018-Aug-03 14:02:51]: dispatching a new clone[1,1] on threadgroup[1]
WARNING: model is classically frustrated
WARNING: model has negative signs

I donot understand the actual reason and how to solve this situation. I used this tutorial before and it worked for ladder spin lattice.

Can anyone please tell me what should I do to solve this situation.

Thanking you,

Santu Baidya