Registration timer expired, but client is still registering?

my app program use coremotionmanager and locationmanager too.when i start the program, i found this error.

ERROR,Time,338977575.2开发者_开发技巧21,Function,"void CLClientHandleRegistrationTimerExpiry(__CFRunLoopTimer*, void*)",Registration timer expired, but client is still registering!

the error is'nt matter to my program ever. but recently i found my opengles view stopped unexpectedly when i move the ipod touch4 (use gyro). i checked my project, can't found any error except this.

anyone know how to slove this error.