App suddenly crashes when run on Device

My app runs great in the simulator, and has been working great on device as well. Today I am trying to install on device and the app crashes. It still works in the simulator. I am getting no debug errors:

[Session started at 2010-07-19 10:35:01 -0700.开发者_开发技巧]
GNU gdb 6.3.50-20050815 (Apple version gdb-1470) (Thu May 27 05:54:06 UTC 2010)
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This GDB was configured as "--host=i386-apple-darwin --target=arm-apple-darwin".tty /dev/ttys002
Loading program into debugger…
Program loaded.
target remote-mobile /tmp/.XcodeGDBRemote-228-34
Switching to remote-macosx protocol
mem 0x1000 0x3fffffff cache
mem 0x40000000 0xffffffff none
mem 0x00000000 0x0fff none
run
Running…
Error launching remote program: failed to get the task for process 856.
Error launching remote program: failed to get the task for process 856.
The program being debugged is not being run.
The program being debugged is not being run.

How can I diagnose?

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Make sure to close the simulator, and do a clean, and then a build and run. also might help to delete the app completely off the device.

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Is this the crash log from the device? If not, the device will store a log of all the crashes and you can get it from that.

http://www.anoshkin.net/blog/2008/09/09/iphone-crash-logs/

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You need to sign it with a development certificate/provisioning profile (this should be the default in the build settings) and entitlements with <key>get-task-allow</key><true/> (this should also be the default).

Does it run at all from the home screen?