You are currently connected to a vehicle

“you are currently connected to a vehicle but it did not return the full parameter list. As a result, the full set of vehicle setup options are not available.” in summary option this prompt showing in GCS , H16 transmitter . Any solution.

Which QGroundControl version?
Which ArduPilot firmware version?

How can we help you without that information?
Can you update both?

thank you for reply.
apk- 4.1.1
firmware- 4.3.5

Backup the parameters and update ArduPilot firmware to 4.5.7

It will automatically preserve/upgrade the parameters for you.
Only if you need to go back to 4.3.5, and only then you can upload the parameters that you backed up.