twig array of objects

I'm working on a symfony2 project.

I send from my controller to twig, an array of arrays of objects.
My array is nicely set, and got the values I want.

But when I try to access to these datas on twig, I can't...
My twig looks like {{ myarray.1.0.getFichier() }}

But, twig didn't call getFichier method of myarray.1.0.

Here is what twig responses to me : Item "getFichier" for "Array" does not exist in CDUserBundle:Prof:edit_session.html.twig at line 74

Edit : dump(myarray.1.0) shows nothing, dump(myarray) shows nothing. But dump() show a blank page...

Edit² : Here is my controller

return $this->render('CDUserBundle:Prof:edit_session.html.twig', array(
            'erreur' => $erreur,'message' => $message,
            'title' => 'C# | Editer session',
            'description' => 'keywords description',
            'sessionInfo' => $sessionInfo,
            'sessionFull' => $sessionFull,
            'documents' => $documents,
            'videos' => $videos,
            'a' => 'showForm',
            'vidName' => $videos[0]->getName(),
            'vidDMCId'=>$videos[0]->getDMCId(),
            'session' => $form->createView(),
            'partPath' => $documents[0]->getFichier()
        ));

My Array is either $documents either $videos Here is when I create arrays

  $videos=array();
    if($sessionFull[0]['sess_vid_id']!=NULL) {
        if($em->getRepository('CD\ConfigBundle\Entity\Video')->findOneById($sessionFull[0]['sess_vid_id']))
            array_push($videos,$em->getRepository('CD\ConfigBundle\Entity\Video')->findOneById($sessionFull[0]['sess_vid_id']));
        else
            array_push($videos,new Video());
        }
    else
        array_push($videos,new Video());
    for($i=0;$i<4;$i++) {
        if($sessionFull[$i]['coursVidId']!=NULL) {
            $vids=array();
            $vidsId=explode(',',$sessionFull[$i]['coursVidId']);
            foreach($vidsId as $vidId) {
                if($em->getRepository('CD\ConfigBundle\Entity\Video')->findOneById($vidId))
                    array_push($vids,$em->getRepository('CD\ConfigBundle\Entity\Video')->findOneById($vidId));
                else
                    array_push($vids,new Video());
            }
            array_push($videos,$vids);
        }
        else
            array_push($videos,array(new Video()));
    }

    $documents=array();
    if($sessionFull[0]['sess_doc_id']!=NULL) {
        if($em->getRepository('CD\ConfigBundle\Entity\Document')->findOneById($sessionFull[0]['sess_doc_id']))
            array_push($documents,$em->getRepository('CD\ConfigBundle\Entity\Document')->findOneById($sessionFull[0]['sess_doc_id']));
        else
            array_push(new Document());
    }
    else
        array_push($documents,new Document());
    for($i=0;$i<4;$i++) {
        if($sessionFull[$i]['coursDocId']!=NULL) {
            $docs=array();
            $docsId=explode(',',$sessionFull[$i]['coursDocId']);
            foreach($docsId as $docId) {
                if($em->getRepository('CD\ConfigBundle\Entity\Document')->findOneById($docId))
                    array_push($docs,$em->getRepository('CD\ConfigBundle\Entity\Document')->findOneById($docId));
                else
                    array_push($docs,new Document());
            }
            array_push($documents,$docs);
        }
        else
            array_push($documents,array(new Document()));
    }