所以我在搞乱基于文档的应用程序，我正在尝试让保存文件工作。我有一个保存为 .lgre 的文件格式，每当我点击保存时，我都会选择位置，然后除了我在那个控制台中得到它之外什么都没有发生。有人可以告诉我出了什么问题吗？
0 CoreFoundation 0x00007fff8c64b64c __exceptionPreprocess + 172
1 libobjc.A.dylib 0x00007fff8e9ca6de objc_exception_throw + 43
2 CoreFoundation 0x00007fff8c64b4fd +[NSException raise:format:] + 205
3 Ligre UI 0x00000001000011b1 -[Document dataOfType:error:] + 129
4 AppKit 0x00007fff933d8fcf -[NSDocument writeToURL:ofType:error:] + 861
5 AppKit 0x00007fff933dbf03 -[NSDocument writeToURL:ofType:forSaveOperation:originalContentsURL:error:] + 494
6 AppKit 0x00007fff933dae6b -[NSDocument _writeSafelyToURL:ofType:forSaveOperation:forceTemporaryDirectory:error:] + 850
7 AppKit 0x00007fff933dbb93 -[NSDocument _writeSafelyToURL:ofType:forSaveOperation:error:] + 28
8 AppKit 0x00007fff933dbd01 -[NSDocument writeSafelyToURL:ofType:forSaveOperation:error:] + 357
9 AppKit 0x00007fff933e8fc5 __66-[NSDocument saveToURL:ofType:forSaveOperation:completionHandler:]_block_invoke_22307 + 240
10 AppKit 0x00007fff933e8ec6 __66-[NSDocument saveToURL:ofType:forSaveOperation:completionHandler:]_block_invoke2304 + 365
11 AppKit 0x00007fff933e72e6 __66-[NSDocument saveToURL:ofType:forSaveOperation:completionHandler:]_block_invoke2176 + 1587
12 AppKit 0x00007fff93426882 __62-[NSDocumentController(NSInternal) _onMainThreadInvokeWorker:]_block_invoke1881 + 175
13 CoreFoundation 0x00007fff8c56954c __CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ + 12
14 CoreFoundation 0x00007fff8c55b655 __CFRunLoopDoBlocks + 341
15 CoreFoundation 0x00007fff8c55b196 __CFRunLoopRun + 1814
16 CoreFoundation 0x00007fff8c55a838 CFRunLoopRunSpecific + 296
17 HIToolbox 0x00007fff9421243f RunCurrentEventLoopInMode + 235
18 HIToolbox 0x00007fff942121ba ReceiveNextEventCommon + 431
19 HIToolbox 0x00007fff94211ffb _BlockUntilNextEventMatchingListInModeWithFilter + 71
20 AppKit 0x00007fff92fbe6d1 _DPSNextEvent + 964
21 AppKit 0x00007fff92fbde80 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 194
22 AppKit 0x00007fff92fb1e23 -[NSApplication run] + 594
23 AppKit 0x00007fff92f9d2d4 NSApplicationMain + 1832
24 Ligre UI 0x0000000100001302 main + 34
25 libdyld.dylib 0x00007fff8cea45c9 start + 1
26 ??? 0x0000000000000003 0x0 + 3
)