Exception-when-saving-Strategy-Defaults-parameter-startIndex

I have a coded strategy that I'm working on, but whenever I click "Save these Parameters as the Strategy's Defaults", I get a "Wealth-Lab 7 Exception" stating the following:

CODE:
System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'startIndex')
   at System.String.IndexOf(String value, Int32 startIndex, Int32 count, StringComparison comparisonType)
   at System.String.IndexOf(String value, Int32 startIndex)
   at RepositorySingleton.CalculateReg(Object , String , Int32 , RepositorySingleton )
   at WealthLab.Backtest.Strategy.AssignParameterDefaults(List`1 values)
   at ComposerAttribute.CountAdvisor(Object , List`1 , ComposerAttribute )
   at WealthLab7.cwStrategy.SaveParameterDefaults(List`1 paramValues)
   at WealthLab7.cwStrategy.ManageModel(Object value, RoutedEventArgs visitor)

Does anyone have a guess as to what might be causing this exception?