Hi,
I've got the same exception when I tried to compile an XML schema where an element had no type. Here is the original - simplified - schema:
<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema xmlns:xsd="
http://www.w3.org/2001/XMLSchema">
<xsd:complexType name="XYZ">
<xsd:sequence>
<xsd:element name="joe">
</xsd:sequence>
</xsd:complexType>
</xsd:schema>
I had to put change the line
<xsd:element name="joe">
to
<xsd:element name="joe" type="xsd:string"/>
Regards,
Zoltan