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
Any Spectrum version
This is seen if ALL of the devices discovered during this run of the scheduled discovery are already modeled in the Spectrum database.
Display the "Model State" column in the "Discovery" tab if ALL of the model found display "Modeled".
If you want the discovery to continue discovering connections, check the "Discover Connection During Scheduled Discovery" check box in the Configuration tab of the Discovery Configuration.