I have exactly this problem bellow with ridgeline 4.0 64 bits SP1.
Ridgeline 4.0 || Unused Port Report Does not Return DataSymptoms Unused Ports Reports in Ridgeline 4.0 does not return data.
Environment Ridgeline 4.0 Service Pack 1 patches 1 through 3
Cause This behavior is a bug in software.
Resolution Upgrade to Ridgeline 4.0 SP2 Patch 1 and newer. Use documented CR rgl0023741 for reference.
But i can't find that document reference and SP2 for download, somebody can help me?