Dears, when running dirloop_sse on the following data containing 15 centers: ------------------------------------------ import pyalps import matplotlib.pyplot as plt import pyalps.plot parms = [] for t in [1.0, 2.0, 3.0, 4.0]: parms.append( { 'LATTICE' : "Mn9W6", 'LATTICE_LIBRARY' : "mn9w6-graph.xml", 'MODEL' : "spin", 'CONSERVED_QUANTUMNUMBERS' : 'Sz', 'local_S0' : 0.5, 'local_S1' : 0.5, 'J0' : 13.0, 'J1' : 27.8, 'D' : -0.02, 'T' : t, 'h' : 0, 'ALGORITHM' : "dirloop_sse", 'THERMALIZATION' : 100000, 'SWEEPS' : 8200000, } ) ---------------------------------------------- everything goes smoothly. When either of spins is raised the following error occurs: size of prob table is zero On the other hand loop algorithm runs without problems. Any idea what is going here? regards -- Tadeusz Wasiutyński