PLEASE HELP - Still Cannot Build Sticker Pack with Xcode Beta 6

I can confirm this is still happening in Beta 6. I'm not sure Apple will believe this is a problem unless they are testing with a Sticker Pack containing animated stickers (10 or so frames) and at least 10 or more stickers. If Apple wants people to actual buy sticker packs, static un-animated stickers or packs of very few stickers, just aren't going to attract buyers. This seems like a HUGE problem this late in the game.

I've tested on both Sierra and El Captitan. On Sierra the app just stalls Compiling, and on El Cap my apps usually crash with exit code 255...

*** First throw call stack:
(
  0   CoreFoundation                      0x00007fff888a14f2 __exceptionPreprocess + 178
  1   libobjc.A.dylib                     0x00007fff92bd2f7e objc_exception_throw + 48
  2   CoreFoundation                      0x00007fff888a1439 -[NSException raise] + 9
  3   IDEInterfaceBuilderKit              0x0000000108ef784a -[IBAbstractPlatformToolProxy _errorByAddingAdditionalCrashInformationToError:orRaiseIfNeededOnFailure:shouldRaiseOnFailures:waitForCrashLog:] + 1579
  4   IDEInterfaceBuilderKit              0x0000000108ef71f5 -[IBAbstractPlatformToolProxy errorByAddingAdditionalCrashInformationToError:orRaiseIfNeededOnFailure:] + 94
  5   IDEInterfaceBuilderKit              0x0000000108ef881e -[IBAbstractPlatformToolProxy _ON_QUEUE_sendMessage:toChannelReturningError:during:] + 228
  6   IDEInterfaceBuilderKit              0x0000000108ef8652 __74-[IBAbstractPlatformToolProxy sendMessage:toChannelReturningError:during:]_block_invoke + 38
  7   libdispatch.dylib                   0x00007fff970a240b _dispatch_client_callout + 8
  8   libdispatch.dylib                   0x00007fff970a39f2 _dispatch_barrier_sync_f_invoke + 74
  9   DVTFoundation                       0x00000001079e3c92 DVTDispatchSync + 206
  10  IDEInterfaceBuilderKit              0x0000000108ef8575 -[IBAbstractPlatformToolProxy sendMessage:toChannelReturningError:during:] + 409
  11  IDEInterfaceBuilderCocoaTouchIntegration 0x0000000113ee7f27 IBUISegmentConfiguration + 6970
  12  IDEInterfaceBuilderCocoaTouchIntegration 0x0000000113ecf738 IBUIControlEventTypeToUIControlEventMask + 25078
  13  IDEInterfaceBuilderKit              0x0000000108e5316c __84-[IBICAbstractPlatformAdapter compileSelectedItems:options:queue:completionHandler:]_block_invoke_2 + 286
  14  DVTFoundation                       0x00000001079e3d4c __DVTDispatchAsync_block_invoke + 156
  15  libdispatch.dylib                   0x00007fff970ad93d _dispatch_call_block_and_release + 12
  16  libdispatch.dylib                   0x00007fff970a240b _dispatch_client_callout + 8
  17  libdispatch.dylib                   0x00007fff970a703b _dispatch_queue_drain + 754
  18  libdispatch.dylib                   0x00007fff970ad707 _dispatch_queue_invoke + 549
  19  libdispatch.dylib                   0x00007fff970b572d _dispatch_main_queue_callback_4CF + 422
  20  CoreFoundation                      0x00007fff888569e9 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 9
  21  CoreFoundation                      0x00007fff888158dd __CFRunLoopRun + 1949
  22  CoreFoundation                      0x00007fff88814ed8 CFRunLoopRunSpecific + 296
  23  IDEInterfaceBuilderKit              0x0000000108eb6563 -[NSRunLoop(IBIDEFoundationRunLoopAdditions) ib_spinRunLoopInMode:whileBlockExecutesConcurrently:] + 514
  24  IDEInterfaceBuilderKit              0x0000000108eb6832 -[NSRunLoop(IBIDEFoundationRunLoopAdditions) ib_spinRunLoopInMode:waitingForSemaphore:] + 131
  25  ibtoold                             0x00000001076f2f66 ibtoold + 12134
  26  ibtoold                             0x00000001076f4824 ibtoold + 18468
  27
Command /Applications/Xcode-beta.app/Contents/Developer/usr/bin/actool failed with exit code 255

Occasionally, with some packs I can get a build on either the Simulator, device or by archiving, but there doesn't seem to be a magic formula to making this happen. A lot of Clean Build Folder, restarting of Xcode, praying, etc.

Unfortunately this didn't make it into seed 6 but should be fixed in the next Xcode build that's posted.

Unfortunately still a problem in the Xcode 8 GM seed (8A218a) that was posted today. 😠

(FWIW: I have the exact same issue with animated icons causing actool to fail with exit code 255 but static ones are fine.)

How are we supposed to submit Animated Sticker Packs for the iOS 10 Launch in a few days?

My expectation had been that this would work in the GM seed of Xcode. Please get new bug reports written up for any case you're seeing it fail and post the bug numbers here.

In the meantime, for animated stickers, you may have to resort to using an external tool for composing them into a single .png file.

Seems to be working 99.9% of the time now. Had one pack misfire, but it actually Archived fine. Just didn't want to run on the device. Hey whatever. Seems mostly fixed. Much thanks to the engineers!