[GSAS-II] Python error and GUI freeze

[Diogo Fernandes De Almeida]

Hi all,

I'm using version 'ab0be8' of GSAS-II (updated today), and I've been consistently getting the following error when trying to run a refinement through the GUI:
Traceback (most recent call last):
  File "C:\Users\dafda1\Anaconda3\envs\GSASII\GSAS-II\GSASII\GSASIIdataGUI.py", line 5541, in OnRefine
    refPlotUpdate = G2plt.PlotPatterns(self,refineMode=True) # prepare for plot updating
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\dafda1\Anaconda3\envs\GSASII\GSAS-II\GSASII\GSASIIpwdplot.py", line 2162, in PlotPatterns
    Page.phaseColors = {p:refColors[i%len(refColors)] for i,p in enumerate(Phases)}
                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\dafda1\Anaconda3\envs\GSASII\GSAS-II\GSASII\GSASIIpwdplot.py", line 2162, in <dictcomp>
    Page.phaseColors = {p:refColors[i%len(refColors)] for i,p in enumerate(Phases)}
                          ^^^^^^^^^
NameError: cannot access free variable 'refColors' where it is not associated with a value in enclosing scope
This makes the progress window and GSAS-II in general freeze, even when I attempt to cancel the refinement through the GUI. Unsure if this is a problem with my Python installation or with GSAS but any guidance would be very appreciated!

Thank you for your time!
Best wishes,
Diogo
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