Hi @PratheepArunRaj ，Thank you for your reply. I have tried the solution you provided, which is to replace "user_segment" with "userSegment". Unfortunately this did not work. I then consulted with client care and confirmed that AT does not support the use of AA sub-classification in the feed.Thank y...

Hi,I can find the sub-classification variable (shown as Subject^User_Segment) in feed and set it as the field column header, then complete all the configuration. When I click save button, it shows the error "Subject.User_Segment" contains invalid characters". How can I use sub-classification variabl...