Program indicator can't get result

I have added a program indicator to count the event number. but no data got , why?
dhis2 ver.2.33.2, I have tried many type of conditions to define the indicator, but no result to got ,even schedule the analysis job manually.

Hi @lin_xd,

Thanks for reporting your issue.

Can you post the expression and the filter you are using, does it align with what is in the DHIS2 documentation?

Also tagging @dhis2-tracker team to assist.

Best regards,
Karoline

Thanks.Sir.
my exp: V{event_count}
no filter

aggressive type: sum
analysis type: event.