ValueError: array must not contain infs or NaNs

[TakuNishiumi]

Hello, Hannu.
When I executed this scipt, I got ValueError.

My environment:
ubuntu18.04
conda 4.8.3
python3.6
ldtk 1.0 pypi_0 pypi

from IPython.display import display, Latex
from ldtk import LDPSetCreator, BoxcarFilter, TabulatedFilter
from ldtk.filters import sdss_g, sdss_r, sdss_i, sdss_z
#from ldtk import BoxcarFilter
#from datetime import datetime

# Input stellar infomation
sc = LDPSetCreator(teff=(5196,24), logg=(4.45,0.01), z=(0.31,0.04), filters=[sdss_g, sdss_r, sdss_i, sdss_z])

ps = sc.create_profiles(nsamples=2000)
ps.resample_linear_z(300)
qc,qe = ps.coeffs_qd(do_mc=True, n_mc_samples=10000)
for i,(c,e) in enumerate(zip(qc,qe)):
    display(Latex('u$_{i:d} = {c[0]:5.4f} \pm {e[0]:5.4f}\quad$'
                  'v$_{i:d} = {c[1]:5.4f} \pm {e[1]:5.4f}$'.format(i=i+1,c=c,e=e)))

and I got below Error.

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-37-35e0573d3d0a> in <module>
     13 ps = sc.create_profiles(nsamples=2000)
     14 ps.resample_linear_z(300)
---> 15 qc,qe = ps.coeffs_qd(do_mc=True, n_mc_samples=10000)
     16 for i,(c,e) in enumerate(zip(qc,qe)):
     17     display(Latex('u$_{i:d} = {c[0]:5.4f} \pm {e[0]:5.4f}\quad$'

~/anaconda3/envs/py35/lib/python3.6/site-packages/LDTk-1.0-py3.6.egg/ldtk/ldtk.py in _coeffs(self, return_cm, do_mc, n_mc_samples, mc_thin, mc_burn, ldmodel, ngc)
    230 
    231                 for i in range(1,n_mc_samples):
--> 232                     pos_t  = multivariate_normal(chain[i-1], diag(s**2))
    233                     logl_t = self._lnlike(pos_t, flt=iflt, ldmodel=ldmodel)
    234                     if uniform() < exp(logl_t-logl[i-1]):

mtrand.pyx in mtrand.RandomState.multivariate_normal()

~/.local/lib/python3.6/site-packages/scipy/linalg/decomp_svd.py in svd(a, full_matrices, compute_uv, overwrite_a, check_finite, lapack_driver)
    107 
    108     """
--> 109     a1 = _asarray_validated(a, check_finite=check_finite)
    110     if len(a1.shape) != 2:
    111         raise ValueError('expected matrix')

~/.local/lib/python3.6/site-packages/scipy/_lib/_util.py in _asarray_validated(a, check_finite, sparse_ok, objects_ok, mask_ok, as_inexact)
    244             raise ValueError('masked arrays are not supported')
    245     toarray = np.asarray_chkfinite if check_finite else np.asarray
--> 246     a = toarray(a)
    247     if not objects_ok:
    248         if a.dtype is np.dtype('O'):

~/anaconda3/envs/py35/lib/python3.6/site-packages/numpy/lib/function_base.py in asarray_chkfinite(a, dtype, order)
    496     if a.dtype.char in typecodes['AllFloat'] and not np.isfinite(a).all():
    497         raise ValueError(
--> 498             "array must not contain infs or NaNs")
    499     return a
    500 

ValueError: array must not contain infs or NaNs

Do you have ideas to solve this?