Since migration to 4.2.3.p16, Metric Engine "Red Hat Enterprise Linux Virtual Datacenter Standard" doesn't work. Software compliance for "Red Hat Enterprise Linux for Virtual Datacenters" is false and incorrect.
CA Software Asset Manager 4.x
Prior to 4.2.0, CA SAM was performing an automated edition upgrade. Customers saw this as a limitation and wanted to be able to control this behavior themselves.
You need to have the metric engine hints. This is now required.