Cannot create designer form class

Failed to parse:
<ui version="4.0" >\n <author></author>\n <comment></comment>\n <exportmacro></exportmacro>\n <class&gt;Dialog</class&gt;\n <widget class="QDialog" name="Dialog" >\n  <property name="geometry" >\n   <rect>\n    <x>0</x>\n    <y>0</y>\n    <width>400</width>\n    <height>300</height>\n   </rect>\n  </property>\n  <property name="windowTitle" >\n   <string>Dialog</string>\n  </property>\n  <widget class="QDialogButtonBox" name="buttonBox" >\n   <property name="geometry" >\n    <rect>\n     <x>30</x>\n     <y>240</y>\n     <width>341</width>\n     <height>32</height>\n    </rect>\n   </property>\n   <property name="orientation" >\n    <enum>Qt::Horizontal</enum>\n   </property>\n   <property name="standardButtons" >\n    <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>\n   </property>\n  </widget>\n </widget>\n <pixmapfunction></pixmapfunction>\n <resources/>\n <connections>\n  <connection>\n   <sender>buttonBox</sender>\n   <signal>accepted()</signal>\n   <receiver>Dialog</receiver>\n   <slot>accept()</slot>\n   <hints>\n    <hint type="sourcelabel" >\n     <x>248</x>\n     <y>254</y>\n    </hint>\n    <hint type="destinationlabel" >\n     <x>157</x>\n     <y>274</y>\n    </hint>\n   </hints>\n  </connection>\n  <connection>\n   <sender>buttonBox</sender>\n   <signal>rejected()</signal>\n   <receiver>Dialog</receiver>\n   <slot>reject()</slot>\n   <hints>\n    <hint type="sourcelabel" >\n     <x>316</x>\n     <y>260</y>\n    </hint>\n    <hint type="destinationlabel" >\n     <x>286</x>\n     <y>274</y>\n    </hint>\n   </hints>\n  </connection>\n </connections>\n</ui>\n

uic: Error in line 1, column 1595 : Extra content at end of document.
File '../untitled3/dialog.ui' is not valid