Hey guys
Been trying to use the last custom action feature to create a zap where “when a message is posted into X channel, automatically create a thread message linked to it”
Here it what it looks like :
![](https://uploads-us-west-2.insided.com/zapier-ca/attachment/19fba3cc-4861-4056-9f06-eb6bbcbd2900.png)
![](https://uploads-us-west-2.insided.com/zapier-ca/attachment/78e855c6-26e1-4e63-aa8b-2a6208af0098.png)
But when I try to use it in my zap, i get the message
Unhandled variable found in the domain filter `{{process.env.BASE_URL}}`
Which I don’t understand I’m unfortunately no developper my knowledge stops here.
Can you help me figure out what is happening?
Here is what the zap looks like; the first 2 steps are working fine, it’s when I add the last one (the custom action) that I get the error :
![](https://uploads-us-west-2.insided.com/zapier-ca/attachment/27c02078-ea3c-4a18-a898-a1a54ebe007a.png)
![](https://uploads-us-west-2.insided.com/zapier-ca/attachment/c7499253-6d75-470e-855b-d5124f0216ea.png)