When TopoFusion cannot connect to the "elevation server", Climbing Analysis won't work even if you have your own GPS data! Waiting for the timeout & error messages (2 of them every time you click anywhere in the Climbing Analysis window!) is VERY irritating! You'd think going thru ONE error message & then checking GPS would allow TopoFusion to bypass the "elevation server" & use your GPS data. Unfortunately that is not how it behaves.
Please fix this annoying problem. Personally I think it would be nice if TopoFusion remembered the last setting of this checkbox (DEM or GPS). Seems like the simplest fix for now at least.