Can't arm after 3.1.1 update

Hey guys,

I keep getting error “pre-arm bad GPS pos”.
I have a brand new apm 2.6 with arducopter v3.1.1 installed. I doubt it’s the GPS battery. Right before this last update, my tricopter armed with no issues. All of a sudden, I download the update. I get this error. Note that I have completely positive 3d gps lock when this happens. Sometimes it says unhealthy GPS but I’m also indoors. I move it close to the window and that particular error goes away. Anyone having this problem?

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Hi Mike,

Check this randy’s comment on other post:

Additional the error might be caused by a low signal reception on the GPS, you should try outdoors.