Return values for the report triggers:

Report triggers return Boolean value FALSE or TRUE. The impact of the return value varies based on the type of report trigger.

The order of report trigger execution is as given below:

BEFORE PARAMETER FORM TRIGGER is fired
↓
Runtime parameter form appears
↓
AFTER PARAMETER FORM TRIGGER is fired
↓
Report is “complied.”
↓
Before Report trigger is fired
↓
Queries are parsed and data is fetched
↓
The report is executed
↓
Among Page trigger fires for each page
↓
Report is closed
↓
After Report trigger is fired