I saw this as a closed ticket from 2009, and there was a comment that support for expressions in the Subject of a scheduled report would be supported in 2.2.
I tried the following, and it didn’t work:
Client Billing Report ${today.firstDay().addDays(-1).format(“M Y”)}
but when I executed the report, the subject in the email was:
“Client Billing Report ${today.firstDay().addDays(-1).format(“M Y”)}”
Am I doing something wrong, or is this feature not implemented?