I didn't memorize the dates where it didn't work... It actually happened more than twice and it's definitely more than one project that is concerned for that matter.
Here's the error message for one of the crahes. Hope it's what you need...
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 libsystem_kernel.dylib 0x95fdb9c6 __pthread_kill + 10
1 libsystem_c.dylib 0x9cf10f78 pthread_kill + 106
2 libsystem_c.dylib 0x9cf01ce3 __abort + 198
3 libsystem_c.dylib 0x9cf01c1d abort + 231
4 com.apple.garageband 0x0034911a 0x1000 + 3440922
5 libsystem_c.dylib 0x9cf6659b _sigtramp + 43
6 ??? 0xffffffff 0 + 4294967295
7 com.apple.garageband 0x00270454 0x1000 + 2552916
8 com.apple.garageband 0x001f1615 0x1000 + 2033173
9 com.apple.garageband 0x001f0123 0x1000 + 2027811
10 com.apple.garageband 0x001e07d4 0x1000 + 1963988
11 com.apple.garageband 0x001ea3f4 0x1000 + 2003956
12 com.apple.garageband 0x0010c325 0x1000 + 1094437
13 com.apple.garageband 0x00111d87 0x1000 + 1117575
14 com.apple.AppKit 0x994476c9 -[NSView _drawRect:clip:] + 3717
15 com.apple.AppKit 0x99476ae6 -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 1958
16 com.apple.AppKit 0x99476e87 -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2887
17 com.apple.AppKit 0x99476e87 -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2887
18 com.apple.AppKit 0x99476e87 -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2887
19 com.apple.AppKit 0x99476e87 -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2887
20 com.apple.AppKit 0x99476e87 -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2887
21 com.apple.AppKit 0x99476e87 -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2887
22 com.apple.AppKit 0x99476e87 -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2887
23 com.apple.AppKit 0x99476e87 -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2887
24 com.apple.AppKit 0x99476e87 -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2887
25 com.apple.AppKit 0x99476e87 -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2887
26 com.apple.AppKit 0x99445026 -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectFor View:topView:] + 708
27 com.apple.AppKit 0x99597a8c -[NSNextStepFrame _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectFor View:topView:] + 286
28 com.apple.AppKit 0x9943fcaa -[NSView _displayRectIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:] + 4817
29 com.apple.AppKit 0x99438bd9 -[NSView displayIfNeeded] + 1365
30 com.apple.AppKit 0x9959795b -[NSNextStepFrame displayIfNeeded] + 91
31 com.apple.AppKit 0x9943599d -[NSWindow displayIfNeeded] + 316
32 com.apple.AppKit 0x994f7977 -[NSWindow _reallyDoOrderWindow:relativeTo:findKey:forCounter:force:isModal:] + 1418
33 com.apple.AppKit 0x994f73e6 -[NSWindow _doOrderWindowWithoutAnimation:relativeTo:findKey:forCounter:force:isModal:] + 79
34 com.apple.AppKit 0x994f72a7 -[NSWindow _doOrderWindow:relativeTo:findKey:forCounter:force:isModal:] + 997
35 com.apple.AppKit 0x994f6e51 -[NSWindow orderWindow:relativeTo:] + 126
36 com.apple.AppKit 0x994f6619 -[NSWindow makeKeyAndOrderFront:] + 69
37 com.apple.AppKit 0x99b352d6 __-[NSWindowController showWindow:]_block_invoke_1 + 358
38 com.apple.QuickLookUIFramework 0x929971b0 -[QLSeamlessDocumentOpener showWindow:contentFrame:withBlock:] + 262
39 com.apple.AppKit 0x995f8c6e -[NSWindowController showWindow:] + 355
40 com.apple.AppKit 0x995f8ae8 -[NSDocument showWindows] + 116
41 com.apple.AppKit 0x997f630e -[NSDocumentController _finishOpeningDocument:andShowWindows:] + 159
42 com.apple.AppKit 0x997fa2c1 -[NSDocumentController(NSDeprecated) openDocumentWithContentsOfURL:display:error:] + 1145
43 com.apple.garageband 0x0006af6d 0x1000 + 434029
44 com.apple.AppKit 0x997f705c -[NSDocumentController _openDocumentsWithContentsOfURLs:presentErrors:completionHandler:] + 196
45 com.apple.AppKit 0x996ce95a __-[NSApplication(NSAppleEventHandling) _handleAEOpenDocumentsForURLs:]_block_invoke_1 + 1812
46 com.apple.AppKit 0x993fb8e1 -[NSDocumentController(NSInternal) _autoreopenDocumentsWithCompletionHandler:] + 54
47 com.apple.AppKit 0x993fb600 -[NSApplication _reopenWindowsAsNecessaryIncludingRestorableState:registeringAsReady:completion Handler:] + 300
48 com.apple.AppKit 0x993fb4cb -[NSApplication(NSAppleEventHandling) _reopenWindowsIfNecessaryWithAppleEvent:completionHandler:] + 260
49 com.apple.AppKit 0x9964ad39 -[NSApplication(NSAppleEventHandling) _handleAEOpenDocumentsForURLs:] + 248
50 com.apple.AppKit 0x993fb21a -[NSApplication(NSAppleEventHandling) _handleCoreEvent:withReplyEvent:] + 701
51 com.apple.CoreFoundation 0x948b01c8 -[NSObject performSelector:withObject:withObject:] + 72
52 com.apple.Foundation 0x919ec0c2 __-[NSAppleEventManager setEventHandler:andSelector:forEventClass:andEventID:]_block_invoke_1 + 121
53 com.apple.Foundation 0x919eae75 -[NSAppleEventManager dispatchRawAppleEvent:withRawReply:handlerRefCon:] + 476
54 com.apple.Foundation 0x919eac49 _NSAppleEventManagerGenericHandler + 234
55 com.apple.AE 0x9bcca045 aeDispatchAppleEvent(AEDesc const*, AEDesc*, unsigned long, unsigned char*) + 202
56 com.apple.AE 0x9bcb3b67 _ZL25dispatchEventAndSendReplyPK6AEDescPS_ + 43
57 com.apple.AE 0x9bcb3a54 aeProcessAppleEvent + 253
58 com.apple.HIToolbox 0x95580a86 AEProcessAppleEvent + 103
59 com.apple.AppKit 0x993f8157 _DPSNextEvent + 1301
60 com.apple.AppKit 0x993f7752 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 113
61 com.apple.AppKit 0x993f3ac1 -[NSApplication run] + 911
62 com.apple.AppKit 0x99684ac5 NSApplicationMain + 1054
63 com.apple.garageband 0x0017fe6b 0x1000 + 1568363
64 com.apple.garageband 0x00002bd2 0x1000 + 7122
65 com.apple.garageband 0x00002af9 0x1000 + 6905