Hi İzzettin, Thanks for your interest. Complete log link is at below. It is happening > when i try to deploy or update an environment. > > http://paste.openstack.org/show/792444/ > I've encountered the error AttributeError: 'method' object has no attribute '__yaql_function__' in our environment recently. I believe it started after we upgraded to the Stein release. I haven't tracked it down yet, but calls to the YAQL function: std:Project.getEnvironmentOwner() in a Murano app seem to generate it. It's good to know that at least someone else has reproduced this. cheers, Andy -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-discuss/attachments/20200430/30ded916/attachment.html>