I ran a file that had a null character in it, and this is the error that I received:
<?xml version=”1.0″?>
<Result State=”FAILED”>
<Error>
<HResult>0xC00CEE2B</HResult>
<Description>
<![CDATA[Illegal xml character.
]]>
</Description>
<Source>XML SAX Parser</Source>
<Type>FATAL</Type>
</Error>
</Result>