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Mission Planner Update Failed

The following message appeared when I checked for updates.  I should add, my logs are not recording.

"Update Faliled.  File download does not match Hash: Geo Utility.dll"

What should I do?

This is my second APM and it is getting very frustrating.  I did

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Compassmot - Possible Glitch

I have did the Compassmot on my hexacopter last year, but 3DRobotics support said the following for my quadcopter that I have just completed and ready to test.

 Hello Dan.

Glad everything is fine now!
A quick note, we have reports that the Compassmot is

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AHRS and DCM in Arducopter

We are a project group at Indian Institute of Technology, Bombay. We are aiming to make an autonomous quad-copter using APM 2.5 and the Arducopter firmware. However we are new to Multi-copters and personally, reading heavy terms like AHRS and Mavlink

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Frustrated

First, let me say that I am a novice. I have been flying APM quads for a little over a year starting with a 3DR quad. I am now on my 5th APM based quad and keep having a similar situation cause me to crash. I don't know whether it is an equipment pro

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