[GSAS-II] GSAS-II keep crashes and giving error

[Victor Zenou]

Hi
I using GSAS-II on windows 10 64 bit home (1809).
Recently GSAS-II keeps crashing every few runs.
Sometimes I get an error, without crashing:
GSAS-II binary directory: C:\Users\Victor\g2conda\GSASII\bindist
6 values read from config file C:\Users\Victor\g2conda\GSASII\config.pyc
Python module versions loaded:
  Python:     2.7.12
  wx:         3.0.0.0
  matplotlib: 1.5.3
  numpy:      1.11.2
  scipy:      0.18.1
  OpenGL:     3.1.1a1
  PIL.Image:  3.4.2
  Platform:   win32 64bit AMD64
This is GSAS-II revision 4054

loading from file: TiSc02_25C.gpx
GPX load successful. Last saved with GSAS-II revision 4054
save to file: TiSc02_25C.gpx
project save successful
 Hessian Levenberg-Marquardt SVD refinement on 8 variables:
C:\Users\Victor\g2conda\GSASII\GSASIIstrMain.py:146:
VisibleDeprecationWarning: using a non-integer number instead of an integer
will result in an error in the future
  covMatrix = result[1]*Rvals['GOF']**2
**** Refinement failed - singular matrix ****
****ERROR - Refinement failed
Traceback (most recent call last):
  File "C:\Users\Victor\g2conda\GSASII\GSASIIdataGUI.py", line 4633, in
OnRefine
    OK,Msg =
G2stMn.Refine(self.GSASprojectfile,dlg,refPlotUpdate=refPlotUpdate)    #Msg
is Rvals dict if Ok=True
  File "C:\Users\Victor\g2conda\GSASII\GSASIIstrMain.py", line 281, in
Refine
    raise G2obj.G2Exception('****ERROR - Refinement failed')
GSASIIobj.G2Exception: '****ERROR - Refinement failed'


Anyone have an idea what's wrong?
Thanks, Victor
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