After running a scheduled AutoDiscovery in Spectrum, the following is seen in the "Modeling" tab:
SPC-OCC-10907: There are not devices to model - stopping modeling
This is seen if ALL of the devices discovered during this run of the scheduled discovery are already modeled in the Spectrum database.
Any Spectrum version
Display the "Model State" column in the "Discovery" tab if ALL of the model found display "Modeled".