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(Mac) SophosUIServer CGSConnection backtrace error

Using Sophos 9.28.  Some Macs are experiencing repeated error messages in the log files that have blown the logs to over 2000 pages.

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Nov 17 09:23:02 c60031147 SophosUIServer[649]: Backtrace (at 146.808):
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 0 CoreGraphics 0x96930a07 CGSBacktraceCreate + 69
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 1 CoreGraphics 0x96cc5b62 CGSLogBacktrace + 12
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 2 CoreGraphics 0x96930ded _ZN12_GLOBAL__N_18Registry12zombie_checkEj + 63
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 3 CoreGraphics 0x96930d4b CGSConnectionRegistryCheckConnectionID + 48
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 4 CoreGraphics 0x96930ca7 CGSConnectionByID + 209
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 5 CoreGraphics 0x96931894 CGSGetConnectionPortById + 17
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 6 CoreGraphics 0x96ba092f CGSWindowAddRegionToDirtyShape + 26
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 7 QD 0x9bdc1c9e QDPlatformFlushWindow + 280
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 8 QD 0x9bdc1e9e QDFlushPortBuffer + 323
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 9 HIToolbox 0x97e17123 FlushPlatformWindow + 41
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 10 HIToolbox 0x97e19e07 _ZL17FlushWindowObjectP10WindowDataPPvh + 1045
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 11 HIToolbox 0x97e2410b _ZL15FlushAllBuffersP19__CFRunLoopObservermPv + 256
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 12 CoreFoundation 0x937f32be __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 30
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 13 CoreFoundation 0x937f320f __CFRunLoopDoObservers + 399
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 14 CoreFoundation 0x937e39d3 CFRunLoopRunSpecific + 371
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 15 CoreFoundation 0x937e384b CFRunLoopRunInMode + 123
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 16 HIToolbox 0x97e1bb5d RunCurrentEventLoopInMode + 259
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 17 HIToolbox 0x97e1b8e2 ReceiveNextEventCommon + 526
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 18 HIToolbox 0x97e1b6bd _BlockUntilNextEventMatchingListInModeWithFilter + 92
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 19 AppKit 0x9272c349 _DPSNextEvent + 1602
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 20 AppKit 0x9272b870 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 119
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 21 AppKit 0x9271e15c -[NSApplication run] + 727
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 22 SophosUIServer 0x0002fedc -[UIServer backgroundServiceDidFinishLaunching:] + 1364
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 23 Foundation 0x94899732 __57-[NSNotificationCenter addObserver:selector:name:object:]_block_invoke + 49
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 24 CoreFoundation 0x9389c5a4 __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 20
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 25 CoreFoundation 0x9377e04b _CFXNotificationPost + 3435
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 26 Foundation 0x9488821f -[NSNotificationCenter postNotificationName:object:userInfo:] + 92
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 27 Foundation 0x948a57de -[NSNotificationCenter postNotificationName:object:] + 55
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 28 SophosGenericsCore 0x00062456 -[SGBackgroundService _finalizeLaunch] + 231
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 29 SophosGenericsCore 0x000627d7 __36-[SGBackgroundService _runWithArgs:]_block_invoke_0 + 318
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 30 libdispatch.dylib 0x93972319 dispatch_once_f + 150
Nov 17 09:23:02 c60031147 SophosUIServer[649]: CGSConnection: current backtrace:: 31 libdispatch.dylib 0x939731bd dispatch_once + 31

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The closest thread I could find is this one: - https://community.sophos.com/products/free-antivirus-tools-for-desktops/f/17/t/7924 but it was unsolved - looks like the user didn't give the further information.

I am running Mavericks 10.9.5 with Sophos 9.28 installed on each machine.  I have tried uninstalling and reinstalling the software and the error has not gone away.

Any ideas would be appreciated.



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