Nowadays i'm often getting Error's if I try to update translation-file like this:
[Twig_Error_Runtime]
Attribute "value" does not exist for Node "Twig_Node_Expression_GetAttr".

It seem's it come's from dynamic part of a transaltion. The Problem is, that it abort on the first twig error, it would be nice if the command run through and make what he can make. --ignore-expetions

Or just get in a prefix-viewfolder as argument:

    $extractor->extract($foundBundle->getPath().'/Resources/views/'.$viewfolder, $catalogue);