On interface it works, but returns an unknown and non debuggable error only when testing on the portal url

Silas B. Ferreira  Which Appian version did you see this on?

I solved it, apparently rule inside rule is an unnsupported feature

Thanks for the update. Nested rules should work just fine, so I'm not sure why that worked. I'm passing this along to our Engineering team so they can check if this is related to some issues we found recently around invalid functions in portals.

I appreciate it. Just giving you more details: the child rule is actually a connection (it calls an external endpoint), then the parent rule was making validations. Ex.: if the connection response is ok (true or false), then returns one/another object from it, etc

Very helpful, thank you.

Very helpful, thank you.