Reading large CDATA from XML file into BigText

Hi, I already checked existing responses on the forum and on internet but I failed to read CDATA in xml file. Could you tell me how to read a large CDATA inside an xml document into BigText?

Example xml:

<response>
<item key="12345">
<content><![CDATA[<p>1024+ characters here......</p>]]>
<item>
</response>

I tried:
CData2 := XMLDoc2.createCDATASection(XMLElement2.selectSingleNode('content').text); but it errors out "the length of the text string exceeds the size of the string buffer" .

Once I have the text in CDATA, I can use CData2.substringData function to move forward.

Thanks in advance.