title: Upgrading existing app to iOS 6
body: <p>while compiling/upgrading one of my existing apps to iOS 6 beta 4, it's crashing on device, however with simulator it's working fine.If anyone has tried it before, that will be really helpful.</p>
  
  <p>Here is the crash log:</p>
  
  <pre><code>Incident Identifier: CC4112AC-DB73-489B-A64D-C946B6B25422
  CrashReporter Key:   ea874c1da9152b46ac359400c82fdc7f548b1778
  Hardware Model:      iPhone4,1
  Process:         AppCatalogue [2248]
  Path:            /var/mobile/Applications/9E3C6AAF-7341-42AF-B1DE-875F3B7A5555/AppCatalogue.app/AppCatalogue
  Identifier:      AppCatalogue
  Version:         ??? (???)
  Code Type:       ARM (Native)
  Parent Process:  launchd [1]
  
  Date/Time:       2012-08-08 11:03:46.526 -0500
  OS Version:      iOS 6.0 (10A5376e)
  Report Version:  104
  
  Exception Type:  EXC_CRASH (SIGABRT)
  Exception Codes: 0x0000000000000000, 0x0000000000000000
  Crashed Thread:  0
  
  Last Exception Backtrace:
  0   CoreFoundation                  0x3674d6be 0x3668b000 + 796350
  1   libobjc.A.dylib                 0x389c697a 0x389be000 + 35194
  2   CoreFoundation                  0x36751222 0x3668b000 + 811554
  3   CoreFoundation                  0x3674f94c 0x3668b000 + 805196
  4   CoreFoundation                  0x366a7464 0x3668b000 + 115812
  5   AppCatalogue                    0x0000a2aa 0x1000 + 37546
  6   AppCatalogue                    0x0000aa12 0x1000 + 39442
  7   UIKit                           0x38167b7c 0x38119000 + 322428
  8   UIKit                           0x3814c936 0x38119000 + 211254
  9   UIKit                           0x38163e12 0x38119000 + 306706
  10  UIKit                           0x3811ff26 0x38119000 + 28454
  11  QuartzCore                      0x3546de96 0x3546a000 + 16022
  12  QuartzCore                      0x3546da34 0x3546a000 + 14900
  13  QuartzCore                      0x3546e970 0x3546a000 + 18800
  14  QuartzCore                      0x3546e34e 0x3546a000 + 17230
  15  QuartzCore                      0x3546e15c 0x3546a000 + 16732
  16  QuartzCore                      0x3546dfbc 0x3546a000 + 16316
  17  CoreFoundation                  0x36722ae8 0x3668b000 + 621288
  18  CoreFoundation                  0x36720ddc 0x3668b000 + 613852
  19  CoreFoundation                  0x36721132 0x3668b000 + 614706
  20  CoreFoundation                  0x36694398 0x3668b000 + 37784
  21  CoreFoundation                  0x36694224 0x3668b000 + 37412
  22  GraphicsServices                0x35049316 0x35044000 + 21270
  23  UIKit                           0x381708f4 0x38119000 + 358644
  24  AppCatalogue                    0x0003052a 0x1000 + 193834
  25  AppCatalogue                    0x00002e54 0x1000 + 7764
  </code></pre>
  
  <p>Thanks.</p>