I'm somes troubles with now() format.
I've used RouteOnAttribute to delete files older than 15 days.
It seems that my expression is failed :
Somebody can help ?
Which NiFi processor are you using this NiFi Expression Language statement in?
What is the value of of the hdfs.lastModified attribute on your FlowFile?
Sorry @Matt, it seems ok, statement return TRUE for files older than 15 days.