The issue comes from my carelessness that creating a causal relationship between two relationship instead of entities [1]. But it seems not be detected by the template validator. I wonder what could be a valid `source` and `target` for causal relationship? Should it be limited to `ALARM`? [1] https://github.com/openzero-zte/vitrage-demo/commit/ce82f6f03e1b7168499233de431323e3cba43f9d#diff-aef3ec3ecbcccbad905bf3c57bb47e95R49 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20160817/e996d338/attachment.html>