#0  -[NSException raise] (self=0x7ffff89fc268, _cmd=0x7ffff58f3aa0 <_OBJC_SELECTOR_TABLE+384>) at NSException.m:955
#1  0x00007ffff54325e6 in +[NSException raise:format:] (self=0x7ffff58f3d40 <_OBJC_Class_NSException>, _cmd=<optimized out>, name=0x7ffff58f4330 <_OBJC_INSTANCE_4>, 
    format=0x7ffff58aea50 <_OBJC_INSTANCE_8>) at NSException.m:835
#2  0x00007ffff537d1d9 in -[GSMutableArray addObject:] (self=0x7ffff89e3498, _cmd=<optimized out>, anObject=0x0) at GSArray.m:454
#3  0x00007ffff684ad7d in splitWordIfQPEncodingTooBig (s=<optimized out>) at NGMimeHeaderFieldGenerator.m:154
#4  +[NGMimeHeaderFieldGenerator encodeQuotedPrintableText:] (self=0x7ffff6ada7a0 <_OBJC_Class_NGMimeHeaderFieldGenerator>, _cmd=<optimized out>, input=<optimized out>)
    at NGMimeHeaderFieldGenerator.m:183
#5  0x00007ffff7b4c1d6 in -[NSString(SOGoURLExtension) asQPSubjectString:] (self=0x7ffff8a005f8, _cmd=0x7fffeb6c9480 <_OBJC_SELECTOR_TABLE+224>, 
    encoding=0x7fffeb6c8f00 <_OBJC_INSTANCE_3>) at NSString+Utilities.m:491
#6  0x00007fffeb49578d in -[SOGoAptMailReceipt getSubject] (self=0x7ffff8a69478, _cmd=0x7fffeb6afd00 <_OBJC_SELECTOR_TABLE+2464>) at SOGoAptMailReceipt.m:184
#7  0x00007fffeb46d907 in -[SOGoCalendarComponent sendReceiptEmailForObject:addedAttendees:deletedAttendees:updatedAttendees:operation:] (self=0x7ffff890d368, 
    _cmd=0x7fffeb6b3890 <_OBJC_SELECTOR_TABLE+2160>, object=0x7ffff8862838, theAddedAttendees=0x0, theDeletedAttendees=0x0, theUpdatedAttendees=0x0, theOperation=EventUpdated)
    at SOGoCalendarComponent.m:1076
#8  0x00007fffeb477ee0 in -[SOGoAppointmentObject updateContentWithCalendar:fromRequest:] (self=0x7ffff890d368, _cmd=0x7fffeb6b3f00 <_OBJC_SELECTOR_TABLE+3808>, 
    calendar=0x7ffff8937e08, rq=0x7ffff88881b8) at SOGoAppointmentObject.m:2296
#9  0x00007fffeb478064 in -[SOGoAppointmentObject PUTAction:] (self=0x7ffff890d368, _cmd=0x7ffff82fc2f0, _ctx=0x7ffff88635e8) at SOGoAppointmentObject.m:2341
#10 0x00007ffff6cedbd5 in -[SoSelectorInvocation primaryCallSelector:withArguments:] () from /usr/lib/libNGObjWeb.so.4.9
#11 0x00007ffff6cffc41 in -[SoObjectWebDAVDispatcher dispatchInContext:] (self=0x7ffff89555d8, _cmd=<optimized out>, _ctx=0x7ffff88635e8) at SoObjectWebDAVDispatcher.m:1775
#12 0x00007ffff6ce0d29 in -[SoObjectRequestHandler handleRequest:inContext:session:application:] () from /usr/lib/libNGObjWeb.so.4.9
#13 0x00007ffff6c76d2e in -[WORequestHandler handleRequest:] (self=0x7ffff864f668, _cmd=<optimized out>, _request=0x7ffff88881b8) at WORequestHandler.m:237
#14 0x00007ffff6c3e68c in -[WOCoreApplication dispatchRequest:usingHandler:] (self=0x7ffff85de488, _cmd=<optimized out>, _request=0x7ffff88881b8, handler=0x7ffff864f668)
    at WOCoreApplication.m:712
#15 0x00007ffff7ff9f7a in -[SOGo dispatchRequest:] (self=0x7ffff85de488, _cmd=0x7ffff6feba10 <_OBJC_SELECTOR_TABLE+1840>, _request=0x7ffff88881b8) at SOGo.m:502
#16 0x00007ffff6cd1acd in -[WOHttpTransaction _run] (self=0x7ffff88c74f8, _cmd=<optimized out>) at WOHttpTransaction.m:596
#17 0x00007ffff6cd2f98 in -[WOHttpTransaction run] (self=0x7ffff88c74f8, _cmd=<optimized out>) at WOHttpTransaction.m:649
#18 0x00007ffff6cce03a in -[WOHttpAdaptor runConnection:] (self=0x7ffff87fc9e8, _cmd=<optimized out>, _socket=<optimized out>) at WOHttpAdaptor.m:367
#19 0x00007ffff6ccee76 in -[WOHttpAdaptor _handleAcceptedConnection:] (self=0x7ffff87fc9e8, _cmd=<optimized out>, _connection=0x7ffff8915e58) at WOHttpAdaptor.m:401
#20 0x00007ffff6ccf20a in -[WOHttpAdaptor _handleConnection:] (self=0x7ffff87fc9e8, _cmd=<optimized out>, connection=0x7ffff8915e58) at WOHttpAdaptor.m:460
#21 0x00007ffff6ccf294 in -[WOHttpAdaptor acceptConnection:] (self=0x7ffff87fc9e8, _cmd=<optimized out>, _notification=<optimized out>) at WOHttpAdaptor.m:521
#22 0x00007ffff547043d in -[NSNotificationCenter _postAndRelease:] (self=0x7ffff831d9b8, _cmd=<optimized out>, notification=0x7ffff8905358) at NSNotificationCenter.m:1223
#23 0x00007ffff556a487 in -[GSRunLoopCtxt pollUntil:within:] (self=0x7ffff8580e98, _cmd=<optimized out>, milliseconds=<optimized out>, contexts=<optimized out>)
    at GSRunLoopCtxt.m:632
#24 0x00007ffff54b5d70 in -[NSRunLoop acceptInputForMode:beforeDate:] (self=0x7ffff8567048, _cmd=<optimized out>, mode=0x7ffff5937520 <_OBJC_INSTANCE_2>, 
    limit_date=<optimized out>) at NSRunLoop.m:1195
#25 0x00007ffff54b4b8c in -[NSRunLoop runMode:beforeDate:] (self=0x7ffff8567048, _cmd=0x7ffff6f54e10 <_OBJC_SELECTOR_TABLE+1360>, mode=0x7ffff5937520 <_OBJC_INSTANCE_2>, 
    date=0x7ffff85dce28) at NSRunLoop.m:1263
#26 0x00007ffff6c3fa6e in -[WOCoreApplication run] (self=0x7ffff85de488, _cmd=<optimized out>) at WOCoreApplication.m:584
#27 0x00007ffff7ff9685 in -[SOGo run] (self=0x7ffff85de488, _cmd=0x7ffff6f772a0 <_OBJC_SELECTOR_TABLE+224>) at SOGo.m:326
#28 0x00007ffff6c64364 in WOApplicationMain (_appClassName=_appClassName@entry=0x7ffff81ff140 <_OBJC_INSTANCE_0>, argc=argc@entry=13, argv=argv@entry=0x7fffffffec18)
    at WOApplicationMain.m:42
#29 0x00007ffff6c803cf in WOWatchDogApplicationMain (appName=0x7ffff81ff140 <_OBJC_INSTANCE_0>, argc=13, argv=0x7fffffffec18) at WOWatchDogApplicationMain.m:1043
#30 0x00007ffff7ff856e in main (argc=13, argv=0x7fffffffec18, env=0x7fffffffec88) at sogod.m:51