Limesurvey upgrade error

The LimeSurvey database is being upgraded (2014-05-21 10:48:46) .

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PHP notice

Trying to get property of non-object

\application\models\QuestionAttribute.php(112)

100     public function getQuestionAttributes($iQuestionID)
101     {
102         $iQuestionID=(int)$iQuestionID;
103         static $aQuestionAttributesStatic=array();// TODO : replace by Yii::app()->cache
104         if(isset($aQuestionAttributesStatic[$iQuestionID]))
105         {
106             return $aQuestionAttributesStatic[$iQuestionID];
107         }
108         $aQuestionAttributes=array();
109         $oQuestion = Question::model()->find("qid=:qid",array('qid'=>$iQuestionID)); // Maybe take parent_qid attribute before this qid attribute
110         if ($oQuestion)
111         {
112             $aLanguages = array_merge(array(Survey::model()->findByPk($oQuestion->sid)->language), Survey::model()->findByPk($oQuestion->sid)->additionalLanguages);
113
114             // Get all atribute set for this question
115             $sType=$oQuestion->type;
116             $aAttributeNames = questionAttributes();
117             $aAttributeNames = $aAttributeNames[$sType];
118             $oAttributeValues = QuestionAttribute::model()->findAll("qid=:qid",array('qid'=>$iQuestionID));
119             $aAttributeValues=array();
120             foreach($oAttributeValues as $oAttributeValue)
121             {
122                 if($oAttributeValue->language){
123                     $aAttributeValues[$oAttributeValue->attribute][$oAttributeValue->language]=$oAttributeValue->value;
124                 }else{