I have 2 ioptron mounts. Using sgp version 2.6.1.114, upgraded to 2.6.1.398 then 2.6.1.602(?). Cannot slew mount to target location. Nudge works in control panel. Problem seems to be that SGP is displaying incorrect mount position. When I click on slew to target, it simply changes the reported mount position to target coordinates without moving the mount. very frustrating. Mounts: iOptron CEM25EC and GEM45EC (new). ASCOM 6.5, iOptron commander works fine. Very limiting as it prevents slewing to target and also plate solving corrections.