in nworks 5.7 we introduced the possibility of a 'simplified VM topology'. This means there are less child objects of VMs by default - we removed the objects for vCPU, vRAM etc (but please note - we did not remove the metrics! Those important counters are still logged, but they are logged against the VMGUEST itself, not a child object)
However - if you want to return to the 5.6 behaviour, and see child objects of vCPU, vRAM, vNIC etc for all your VMs - then you simply change one setting
. For the discovery rule 'nworks Stage 4 - virtual machine discovery' override the parameter 'Enable VM Child Objects' to ENABLED.
For details see the Operations Guide page 11 'Virtual Machine Topology Options'.
Hope that helps!