Magnetic Interference

[RolandS888]

Just wondering whether you guys know if there is a remedy to the Magnetic Interference warning.
I seem to get it quite often, doesnt matter what I fly off from, stone, grass, bitumen I seem to get the warning more often than not.
I have not done a compass cal, would this fix it? Any other things I could try?
I would actually like to take off from a mat on the roof of my van, which I usually do with my Discovery pros, but I dont think that would work with solo would it?

 

[Raybro]

I would try a compass calibration. I usually take off from my driveway. I have taken off from my concrete apron in front of the garage but I do occasionally get the interference warning because of the rebar. I have a piece of plywood I use in the grass as well.