Error 70 on Canon Cameras

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What steps will reproduce the problem?
1. In Dashboard, set Jpeg properties to smallest jpeg size
2.
3.

What is the expected output? What do you see instead?
This is an illegal property for certain cameras (Canon 550d for instance)

What version of the product are you using? On what operating system?
Current Google Play app (Aug. 27, 2013)  on a Google Nexus tablet (Android 4.3)

Please provide any additional information below.
A word of caution about this app - I discovered to my shock that it's possible 
to set illegal properties to the camera (in my case a Canon 550D - T2i) such as 
image size/properties. When this happens, the camera generates the dreaded 
"Error 70" message and becomes totally unresponsive/bricked. Luckily, I was 
able to reverse the setting, after a lot of research, so my camera was able to 
recover. So, be careful when using it -- otherwise, it looks like a useful tool 
for controlling DSLRs.

Original issue reported on code.google.com by edai...@gmail.com on 28 Aug 2013 at 3:31

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Yes I saw this report from another user. It must be the image size property as 
I only added that property in last version for Canon. Probably the 650D has 
more options for that property then the 550D.

Original comment by hub...@gmail.com on 28 Aug 2013 at 4:33

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Just a question did you maybe set the S2 or S3 image quality?

Original comment by hub...@gmail.com on 28 Aug 2013 at 5:00

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Yes, I think that is the case.  I have Canon crash log file but it is
specific to Canon firmware and it shows assertions...
 On Aug 27, 2013 10:00 PM, <dslrdashboard@googlecode.com> wrote:

Original comment by edai...@gmail.com on 28 Aug 2013 at 5:05

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Probably that coused the error, I checked the 550D manual and there is no S2, 
S3. I removed those 650D specific settings and will be displayed only for 650d

Original comment by hub...@gmail.com on 28 Aug 2013 at 5:14

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So, could Dashboard use a query or lookup table for allowable values for
attached camera and disallow illegal values?  I was surprised that the app
was able to write to Canon ROM firmware.

Original comment by edai...@gmail.com on 28 Aug 2013 at 5:15

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For that property not. Actually the camera would not allow to write a value 
that is not supported or that would put it in some error state but seams this 
is not the case with Canon and the image quality settings.

Original comment by hub...@gmail.com on 28 Aug 2013 at 5:18

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This just happened to me on my 7D.  I'm pretty sure it happened when I tried to 
select a smaller JPG size.  Obviously am VERY unhappy about this.  Any 
suggestions?

Original comment by melo...@gmail.com on 16 Sep 2013 at 2:21

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Here you can read about this:
http://www.reikan.co.uk/photography/blog/?p=1550

Original comment by hub...@gmail.com on 16 Sep 2013 at 2:23

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The developer says he fixed this for the 550d but I guess not for the 7D?
 What worked for me was to go back and connect the camera to the phone/tablet, start the app, turn on the camera, have the app take over control of the camera, and then in the app settings, make sure you have selected a "legal" correct jpeg size for your camera...  that cleared out the error code and allowed me to regain control of the camera.  Then, in the 7d camera menu, just to be safe, set it back to all of the original default settings.

Original comment by edai...@gmail.com on 16 Sep 2013 at 3:25

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I removed the S2, S3 JPG image settings that are valid for 650D. Not sure what 
image settings caoused the error.

Original comment by hub...@gmail.com on 16 Sep 2013 at 3:37

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For anyone else with this issue and a 7D....I got out of ERR 70 mode with the 
help of a thread on AstronomyForum:

1./ remove battery & Lens
2./ remove CF card
2.1/ Put battery back in. (Leave Lens off)
3./ Put camera in C1 (C2 & C3 didnt work)
4./ turn camera off
5./ turn setting to CA
6./ Turn Camera on
7./ Turn Camera to new (any) setting
8./ Should then be out of ERR 70. 

I then did a 'clear all camera settings' for good measure.  Pretty nasty scare. 
 Should definitely remove any quality sizes for the 7D that are not compatible.

Original comment by melo...@gmail.com on 16 Sep 2013 at 7:38

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I have this exact problem with my canon EOS 500D. Have someone solved it?

Original comment by serxio...@gmail.com on 4 Oct 2013 at 11:53

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I tried to connect again to the app but now it doesnt recognize it. I also 
can´t connect the camera via USB to my computer.

Original comment by serxio...@gmail.com on 5 Oct 2013 at 12:18

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I habe the same Problem. Tried DslrDashboard today and now may 1dmk4 only shows 
"Err 70".
Any ideas what I should try before I send the camera in for a probably 
expensive repair? The 1D has no C1(/2/3) mode.

Original comment by rmweis...@gmail.com on 7 Dec 2013 at 4:15

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Had this problem while first trying to connect my 5D MKII. Wireless didn't work 
at first, so I then tried directly through USB. That worked but appeared slow. 
While fiddling with the settings I chose the smallest JPEG mode and from then 
on camera went into Error 70. C1 restored it, did CA too but I don't think it 
was necessary. Thanks, I was started to sweat thinking I bricked my camera.

Original comment by peter.va...@gmail.com on 26 Dec 2013 at 7:27

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Oh, and after that, wireless worked as well, but not until I used DSLRDashboard 
through USB first.

Original comment by peter.va...@gmail.com on 26 Dec 2013 at 7:29

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Thx guys i had the same problem with my canon 550D! i Conectet the usbcabel 
with the tablet and the camra and changed the sice of the images to L and now 
it works agan!

Original comment by eliashar...@gmail.com on 30 Jan 2014 at 11:41