StochOM ktype=bsymm, grid=btime giving NaN

[sandimas]

When running ACFlow (current master branch) the stochastic optimization method for symmetric time kernels I am getting NaN for the delta. Below is the output.

I've attached an example script with input data. I also run MaxEnt which converges well.

Thanks.

[ StochOM ]
Create infrastructure for Monte Carlo sampling
Postprocess input data: 201 points
Build grid for input data: 201 points
Build mesh for spectrum: 1000 points
try ->      1 (    25) Δ ->      NaN 
try ->      2 (    25) Δ ->      NaN 
try ->      3 (    25) Δ ->      NaN 
try ->      4 (    25) Δ ->      NaN 
try ->      5 (    25) Δ ->      NaN 
try ->      6 (    25) Δ ->      NaN 
try ->      7 (    25) Δ ->      NaN 
try ->      8 (    25) Δ ->      NaN 
try ->      9 (    25) Δ ->      NaN 
try ->     10 (    25) Δ ->      NaN 
try ->     11 (    25) Δ ->      NaN 
try ->     12 (    25) Δ ->      NaN 
try ->     13 (    25) Δ ->      NaN 
try ->     14 (    25) Δ ->      NaN 
try ->     15 (    25) Δ ->      NaN 
try ->     16 (    25) Δ ->      NaN 
try ->     17 (    25) Δ ->      NaN 
try ->     18 (    25) Δ ->      NaN 
try ->     19 (    25) Δ ->      NaN 
try ->     20 (    25) Δ ->      NaN 
try ->     21 (    25) Δ ->      NaN 
try ->     22 (    25) Δ ->      NaN 
try ->     23 (    25) Δ ->      NaN 
try ->     24 (    25) Δ ->      NaN 
try ->     25 (    25) Δ ->      NaN 
Median χ² :              NaN Accepted configurations :     0

som_check.zip