still not working. On the client, I'm getting the following log messages.
on first failure:
8/21/16 9:28:33.827 AM com.apple.prefs.backup.remoteservice[5932]: CGContextSetFillColorWithColor: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.
8/21/16 9:28:33.828 AM com.apple.prefs.backup.remoteservice[5932]: CGContextSetStrokeColorWithColor: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.
8/21/16 9:28:33.828 AM com.apple.prefs.backup.remoteservice[5932]: CGContextGetCompositeOperation: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.
8/21/16 9:28:33.828 AM com.apple.prefs.backup.remoteservice[5932]: CGContextSetCompositeOperation: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.
8/21/16 9:28:33.828 AM com.apple.prefs.backup.remoteservice[5932]: CGContextFillRects: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.
8/21/16 9:28:33.828 AM com.apple.prefs.backup.remoteservice[5932]: CGContextSetCompositeOperation: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.
8/21/16 9:28:33.828 AM com.apple.prefs.backup.remoteservice[5932]: CGContextClipToRect: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.
8/21/16 9:28:33.828 AM com.apple.prefs.backup.remoteservice[5932]: CGContextGetShouldSmoothFonts: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.
8/21/16 9:28:33.828 AM com.apple.prefs.backup.remoteservice[5932]: CGContextGetFontSmoothingStyle: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.
8/21/16 9:28:33.828 AM com.apple.prefs.backup.remoteservice[5932]: CGContextGetFontAntialiasingStyle: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.
8/21/16 9:28:33.828 AM com.apple.prefs.backup.remoteservice[5932]: CGContextSetFontSmoothingStyle: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.
8/21/16 9:28:33.828 AM com.apple.prefs.backup.remoteservice[5932]: CGContextGetCTM: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.
8/21/16 9:28:33.828 AM com.apple.prefs.backup.remoteservice[5932]: CGContextGetDefaultUserSpaceToDeviceSpaceTransform: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.
8/21/16 9:28:33.829 AM com.apple.prefs.backup.remoteservice[5932]: CGContextSaveGState: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.
8/21/16 9:28:33.829 AM com.apple.prefs.backup.remoteservice[5932]: CGContextConcatCTM: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.
8/21/16 9:28:33.829 AM com.apple.prefs.backup.remoteservice[5932]: CGContextSaveGState: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.
8/21/16 9:28:33.829 AM com.apple.prefs.backup.remoteservice[5932]: CGContextDrawImages: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.
8/21/16 9:28:33.829 AM com.apple.prefs.backup.remoteservice[5932]: CGContextRestoreGState: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.
8/21/16 9:28:33.829 AM com.apple.prefs.backup.remoteservice[5932]: CGContextRestoreGState: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.
8/21/16 9:28:33.829 AM com.apple.prefs.backup.remoteservice[5932]: CGContextGetCTM: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.
8/21/16 9:28:34.000 AM kernel[0]: ASP_TCP CancelOneRequest: cancelling slot 0 error 89 reqID 1 flags 0x9 afpCmd 0xF so 0xd219891fd688be91
8/21/16 9:28:34.066 AM NetAuthSysAgent[5999]: afp_sendmsg: sendmsg failed 0xffffffff errno = 89
8/21/16 9:28:34.066 AM NetAuthSysAgent[5999]: ERROR: AFP_GetServerInfo - connect failed 89
8/21/16 9:28:34.227 AM com.apple.prefs.backup.remoteservice[5932]: Error in CoreDragRemoveTrackingHandler: -1856
8/21/16 9:28:34.227 AM com.apple.prefs.backup.remoteservice[5932]: Error in CoreDragRemoveReceiveHandler: -1856
8/21/16 9:28:36.444 AM com.apple.prefs.backup.remoteservice[5932]: Error while confirming network destination: Error Domain=NSOSStatusErrorDomain Code=89 "dsMDEFNotFound / ECANCELED: could not load MDEF / Operation canceled"
On second failure:
8/21/16 9:23:58.592 AM NetAuthSysAgent[5995]: FindValidIPAddress - connect failed socket 1, optionValue 60
8/21/16 9:23:58.592 AM NetAuthSysAgent[5995]: FindValidIPAddress - connect failed socket 0, optionValue 60
8/21/16 9:24:39.045 AM NetAuthSysAgent[5995]: ERROR: AFP_GetServerInfo - connect failed 64
8/21/16 9:24:39.073 AM UserEventAgent[39]: Failed to send message because the port couldn't be created.
8/21/16 9:24:39.073 AM UserEventAgent[5763]: com.apple.TMHelperAgent.SetupOffer enabled
8/21/16 9:25:17.634 AM UserEventAgent[5763]: com.apple.TMHelperAgent.SetupOffer enabled
8/21/16 9:25:17.634 AM UserEventAgent[39]: Failed to send message because the port couldn't be created.