Alarm Notification Not Using Custom Email

I’ve set up some alarms on tags in a transaction group. For some reason, the custom email text isn’t being used, and the default text for the notification pipeline is used but if I change the custom subject line, it has no problem using that. It may be because the custom subject is direct text and the email text is an expression. Here’s the expression I’m using, is the {this.value} variable allowed in this context? 'Event Time is High. Value: ' + {this.value}/1000 + ' seconds

Solved. {this.value} wasn’t valid, but I can reference the same tag I’m using in the transaction group from the tag browser and it works then.