Hi everyone!

Sorry to open again a thread with this error but after read a lot of threadsof this matter in this forum and in other websites I can not repair the Error 29 of my phantom 2.

I recalibrate the RC first, after the phantom and nothing. I deleted all the old info of my Mac and reinstall both programs and do it again. I tryied with different baterries, updated the software to the latest version, I empied the batery of my RC and full charget. Tried  to reaclibrate it indoor and outside. Reset de BTU info.

I don't know what more to do.
Many thanks

Here is typical symptom/solution...Have you tried?
Also, one fellow went through the this a hundred times only to find a loose connector in his RC...Maybe something to check and easy to do...

Motors Start failure caused by TX stick(s) mid point error too big
If the TX stick(s) mid point error is too big, Motors Start will fail when you execute the Combination Stick Commands (CSC) and lead to the aircraft will not takeoff.. And the LED will blink Red four times per second continually to warn you.
TX stick(s) mid point error too big can be caused by the following reasons:
(1)        There is TX stick (except the throttle stick) not at center when power on the autopilot system.
(2)        The TX sticks has been trimmed, which leads to the large deviation of mid point. For example, the SUB-TRIM has been adjusted for Futaba transmitter.
(3)        The TX stick(s) travel has larger asymmetry.
For the reason (1), please put all TX sticks at the mid point, and then power cycle the autopilot system to re-record the mid point. If the problem continues, that can be caused by the reason (2) or reason (3), you need to adjust the output range of your TX, and then use the Assistant Software to   redo the TX calibration. Please carry out the following procedures.
(1)        Connect to the Assistant software, click Basic-> R/C-> Command Sticks Calibration, and push all TX sticks throughout their complete travel range to see if any stick cannot reach its largest position.
(2)        Adjust the largest travel of TX stick until the cursor on the Assistant software can reach both end positions, according to your TX manual.
(3)        Power cycle the autopilot system, note that power cycle is required.
(4)        Redo the TX calibration according to the Assistant software.

follow the steps given by Northofthe49th! very valuable info

Hi,
I have the same problem.  it may be a coincidence but it happened after I was able to successfully flash my NAND and get my video back.  Now I can only fly for a min and I get this error and the drone immediately lands wherever it is and has tipped over twice.  Any ideas?   

Hi - I don't know what error 29 is, but if it lands so quickly, it almost always means your battery is shot.  I would replace the battery and see what happens.  Finding good P2 batteries is tricky these days.  Good luck.