Hi Folks. I'm getting the following error when backtesting an algo, which ran fine upto a few weeks ago. 

Error invoking CBOE/VIX.QuandlVix data reader. Line: 2006-08-18,12.11,12.52,11.57,11.64 Error: Property with name 'vix close' does not exist. Properties: Time, Symbol, Value open, high, low, close

Changing self.ValueColumnName = "vix close" to self.ValueColumnName = "close" in the following class fixes the issue. Has the column name in quandl vix data changed? Thanks in advance

class QuandlVix(PythonQuandl):
   
   def __init__(self):
       self.ValueColumnName = "vix close"

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