What steps will reproduce the problem? 1. Create a launchconfiguration, a autoscaling group and a trigger 2. ./as-describe-triggers --auto-scaling-group yourgroup -show-long -H 3. The NameSpace is (nil) and the scalingtrigger is blocked at NoData

Doing the same but passing "AWS/EC2" as a namespace makes the trigger works. But unfortunaly there is no Namespace property in the trigger object.

For what is worth, Namespace is listed as required : http://docs.amazonwebservices.com/AutoScaling/latest/DeveloperGuide/