FileException in UploadedFile.php line 235:

I tried to upload an image file into a specified folder..

But it shows an Error like this

FileException in UploadedFile.php line 235:
The file "download (1).jpg" was not uploaded due to an unknown error.

My controller function is something like this

function postSave( Request $request)
{

    $rules = $this->validateForm();
    $validator = Validator::make($request->all(), $rules);  
    if ($validator->passes()) {
        $data = $this->validatePost('tb_hotel');

        $id = $this->model->insertRow($data , $request->input('hotel_id'));

        if(!is_null(Input::file('logo')))
        {
            $updates = array();
            $file = $request->file('logo');
            $destinationPath = public_path().'/uploads/hotels/';
            $filename = $file->getClientOriginalName();
            $extension = $file->getClientOriginalExtension(); //if you need extension of the file
             $newfilename = $id.'.'.$extension;
             // print_r($newfilename);exit;
            $uploadSuccess = $request->file('logo')->move($destinationPath, $newfilename);
            if( $uploadSuccess ) {
                $updates['logo'] = $newfilename; 
            } 
            $this->model->insertRow($updates , $id );
        }   
        .
        .
        .
        .           

}

I don't know why!!.. I'm using the same function in another controller there it works properly..

But here it show me an error like I mention above..

Someone please help me..

Thanks

via Chebli Mohamed