Troubleshooting – missing modules

There are various known issues w.r.t. “missing” modules.

– The “Core power distribution module” can cause issues. Switching it off for more than 30 seconds can solve some problems
See this posts on the forum:
http://ftcforum.usfirst.org/showthread.php?4993-Update-on-USB-Disconnect-Issues-%28unable-to-detect-USB-modules-during-scan%29/page31

– There are known software issues with the USB communication. The new “beta” version of the software may solve this (it automatically reconnects to the controllers after a communication error, not causing the robot to go into E-stop. See this post in the forum:

http://ftcforum.usfirst.org/showthread.php?6479-Heads-up-New-quot-beta-quot-branch-released-on-GitHub-Repository-%28App-Inventor-to-follow%29

– You might be able to diagnose problems using the “Core discovery” program: Connect the USB of the “Core power distribution module” to your PC (using an USB A to mini-B cable) and see of all modules are available and can be controlled:

http://www.modernroboticsinc.com/coredevicediscovery

– For further diagnostics: please show the exact screen content when the error occurs, and send all the log files from the phone, together with the version information from your phone, PC and SDK.

https://drive.google.com/file/d/0B0z7bZfPuXgQS25nbEpFSWpILW8/view?pref=2&pli=1