During cruise with cruise altitude entered in MCP and VNAV (FMS)/autopilot coupled, I'm getting slight "jumps" of plus/minus 40-80 feet. I know about the FS9 altitude "leaps" over certain parts of the water (eg N. Atlantic) but this is happening everywhere in all my complex aircraft (PMDG/Level D etc). I seem to recall either an entry or a deletion in AS6.5/FSUIPC which prevented this. I did not have this issue until I recently reinstalled AS6.5 with registered FSUIPC and I don't recall the tweak. Appreciate any help.ThanksR.M. Perry

During cruise with cruise altitude entered in MCP and VNAV (FMS)/autopilot coupled, I'm getting slight "jumps" of plus/minus 40-80 feet. I know about the FS9 altitude "leaps" over certain parts of the water (eg N. Atlantic) but this is happening everywhere in all my complex aircraft (PMDG/Level D etc). I seem to recall either an entry or a deletion in AS6.5/FSUIPC which prevented this. I did not have this issue until I recently reinstalled AS6.5 with registered FSUIPC and I don't recall the tweak. Appreciate any help.ThanksR.M. Perry

Make sure that VAS is turned off in AS6.5 - this simulates updrafts and downdrafts and will sometimes cause the effect you mention.DJ

Make sure that VAS is turned off in AS6.5 - this simulates updrafts and downdrafts and will sometimes cause the effect you mention.DJ

Thanks!RP