That's great feedback / thank you. I will connect as your user account and simulate the experience. Hopefully I receive the same error, which will make it easy to provide a fix. Stay tuned

The JD app, including the servo profile function works perfectly on my old HTC Thunderbolt running Android 4.0.4. I was able to use that phone to demo my JD robot at a local mini makerfaire last weekend.

Interesting... I'm still unable to identify a cause. Don't even know what I could change to begin to fix it for your device. It's still on my list though, maybe I will see a bug report resolve it soon from xamarin.

There is a new version of the android app - please try that one and let me know your result. Thanks

It no longer crashes, but I get an error saying I'm missing a .txt file. I checked the directory and found the folder referenced in the error, but there is only a config.xml file present. See attached photos for the error and the directory.

Delete that folder named -148738264

It would appear the storage on your device was corrupted and a file ended up missing.

That worked! Thanks for all the support.

Glad to hear it!