Keyword test tutorial, part 5

Instructions say:



Now, we can modify the identification property value for the CardSelector mapped object. To do this:

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  In the Properties panel of the Name Mapping editor, click the ellipsis button in the NativeClrObject.Name property value cell. The Edit Property Value dialog will appear.

  
  


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  In the dialog, select Project Variable from the Mode drop-down list and specify the previously created RadioButtonName variable in the Type box.

Problem:  I can't select the variable.  There's nothing it the dropdown. 



Thanks.