CFCHART xaxistype

Hi,
When building a chart using values from a simulation that I
am running, I encounter a problem when I try to enter decimal
numeric values in for the xaxis.
From my understanding, when the "xaxistype" is set to "scale"
in the 'cfchart' tag I can now enter numeric values in "item" field
of the 'cfchardata' tag. This works when the numbers entered are
integers. But when the numbers includ a decimal, an error is
returned (included below).
Can anyone give me advice on this? Has anyone been able to
enter decimal numeric values for the x axis? If so, how?
Thank you!
ERROR :

You can alter the default chart style (or create a new chart
style) by editing the default.xml file in the
CFROOT\charting\styles folder.
I copied and changed the default.xml file and saved it as a
new xml style file. I then invoke the new style using the
<cfchart style="newstyle"... parameter where newstyle is
the name of the new file.
In the xml file itself, all you have to do is change the
isInterpolated parameter in the <frameChart tag> from
isInterpolated="true" to
isInterpolated="false"

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