Hi Atlas Cached, I have a similar problem. My Garmin Oregon 650 Geocache results page shows "No Results Found" and "Try Adjusting Search Parameters".
I first tried to Reset All Settings by: 1) Turn on my Oregon 650, 2) Select Setup, 3) Select Reset (2nd choice from the bottom), 4) Select Reset All Settings, 5) Reset
I saw this procedure in a GPS City tutorial video in You Tube.
When I load GPX files to my Oregon 650, I first select to load the GPX file from the Geocaching.com Geocache Window. They appear in my laptop's Downloads Folder. I drag them into the GPX Folder (By dragging and highlighting GPX and release the mouse button). I checked the 650's GPX folder and found the Geocache GPX files are loaded in the GPX folder and not under Nav, as would be shown in my Garmin eTrex 30. When I go to select the Geocache Treasure Chest in the 650, I receive an error message "No results Found". I performed the SQL rename to SQL-old as you recommended for SDKonkle above. After that, I still had the same error message. Within the Oregon 650, I dragged the GPX files from the GPX folder into the GPX Nav Folder. Same result. Will you please help me fix this trouble?