# dagster-plus

Todd de Quincey

09/01/2023, 1:28 PM
Slack alerts not working on Dagster Cloud
Hi, I have setup the Slack Alert in Dagster Cloud which applies to all jobs and should be triggered when a job fails. However, I manually materialized an asset (which I knew would fail), and I didn’t receive an alert. Please see the attached screenshots.
Alert setup in Dagster Cloud
Dagster Slack app correctly installed in Slack
Manual run which failed, which I expected to result in an alert in Slack
Alert policy JSON
Any clues?

Danilo Oliveira

09/01/2023, 1:44 PM
Hi Todd, did you add the Dagster Cloud user to the channel you are sending the messages to?

Todd de Quincey

09/01/2023, 1:53 PM
Thanks, @Danilo Oliveira. That was the missing piece of the puzzle.
D 2


09/01/2023, 2:58 PM
Glad you were able to figure this out - there should be an event log line at the end of the run that failed if there was a Slack API failure writing the alert (in this case i'd expect it to be something like 'not_in_channel')