The '%{strQName/}' element at line %d{iLine/}, column %d{iCol/} (namespace '%{strNSURI/}') cannot appear under %1[%{strName/}%]%[/%{strName/}% ...

The '%{strQName/}' element at line %d{iLine/}, column %d{iCol/} (namespace '%{strNSURI/}') cannot appear under %1[%{strName/}%]%[/%{strName/}%] because the parent already contains a child element, '%{strFirstChild/}'.