Visual fIlter bug? A field throws an error when I "advance filter" a chart

[ThomasDay]

 Hello All,

I have visualization that I need to filter by a "rank" decimal field. I want to use it to filter out a values that are very out of range and causing the visual scale to compress. 

When I enter a decimal point in the advance filter box, it throws an error--please enter a valid value. 

I am showing two screen captures below.  The first shows that the visual will recognize the field I'm looking to filter on, it is a decimal, and that  it's paired up properly with the value bar it ranks.  (It's the rank field.)  The second shows the error symbol.  The tool tip  is "please enter a valid value"  If I go to basic filtering, I get a huge list of distinct values.

Any ideas?  Tom

[Sean · Accepted solution]

@ThomasDay Start with zero then decimal point

[ThomasDay]

OK, that's what I thought--I was just missing something.  Thanks @Sean