XMLPort xml layout consistency

Is there any way to import an xml file in NAV (using RTC) using an XMLPort where the import sometimes has incomplete set of elements. So, for example, the XMLPort structure would be like:

<Navision_Export>
<Element1>
<Attribute1>
<Element2>
<Attribute1>
<Element3>
<Attribute1>
<ELement4>
<Attribute1>

And an xml file comes in, sometimes as:
<?xml version="1.0" encoding="UTF-8"?>
<navision_export>
<Element1 Attribute1="teststring" />
<Element1 Attribute1="teststring" />
<Element2 Attribute1="teststring" />
<Element2 Attribute1="teststring" />
<Element3 Attribute1="teststring" />
<Element3 Attribute1="teststring" />
<Element4 Attribute1="teststring"/>
</navision_export>

or as:
<?xml version="1.0" encoding="UTF-8"?>
<navision_export>
<Element1 Attribute1="teststring" />
<Element1 Attribute1="teststring" />
<Element2 Attribute1="teststring" />
</navision_export>

Currently I'm getting an error in RTC. However in Classic everything works fine.