Scanner Arm didn't work

[derega16]

I sent a rover to Eve but its scanner arm only worked only for the first time. I tried to scan other features but it said "can not analyze..." after the scanning is done no matter what the feature is.

Edited August 17, 2020 by derega16

[Supernovy]

If the scan is aborting, it's probably because the rover moved a little, the solution to that would be increasing the brakes on the wheels if possible.

If the scan is completing but doesn't give any science, it's because you can only scan a surface feature once with a given size of scanner arm, and you need to come back with a bigger one to get more science from that type of feature.

If the arm isn't even attempting to scan, make sure you're close enough to the feature and make sure it's the kind of feature that can be scanned with the arm. Some features can only be scanned with an arm, some can only be picked up by a Kerbal on EVA, and some are just graphical only, if you have terrain scatters turned on in the settings. On Eve, the volcanic rock can only be picked up by a Kerbal, while the basalt formation and pancake dome features can only be scanned by an arm.