Formatting date and sending message in Slack threads work in testing, but not as a published zap run

HI ​@stephroo 

Help links for using Slack in Zaps: https://zapier.com/apps/slack/integrations#help

For live Zap Runs, for each Zap step, you can see the DATA IN/OUT to help you troubleshoot and trace the data flow.

Check that there is a value for the mapped variable.

You can add a Filter step to check a variable value exists: https://zapier.com/apps/filter/integrations#help

Hey ​@stephroo, welcome to the Community! 👋

The Thread Ts and Thread Ts Time fields would be empty if the message that triggers it is a standalone message, meaning it's not part of a thread at all (it hasn't been replied to yet, and it isn't a reply itself). For messages like the one in your screenshot that don't have any replies, you'd want to use the Ts field instead, since that's the unique ID for that specific message. Any replies posted under that top-level message would have the top-level message's Ts as the Thread Ts value.

I’m guessing you’d only ever want that P&C bot to reply to top level messages in that channel and not messages within a thread right? If that’s the case, then you’ll need to use a Filter like Troy said. And set it up to only allow the Zap to continue if the Thread Ts field Does not exist, meaning it’s a top level message as no value exists for that field. 

Let us know how it goes if you give that a try!

When you test each step by itself, it works fine. But when the whole Zap runs, the date comes back empty.

Just add  a Filter step right after your Slack trigger. Tell it to only go ahead if Thread Ts actually has something in it. That way the formatter never sees a blank value.