UrBackupClientBackend.exe crashing Windows 2008

We just upgraded to the latest urbackup server, 1.3.2.466-1ubuntu1~precise running on an ubuntu server with ZFS storage.
Also upgraded the windows client on the 2008 server to the latest package.
Backups will crash shortly in to the process.

Windows Event Viewer:

Faulting application name: UrBackupClientBackend.exe, version: 0.0.0.0, time stamp: 0x529d0b91
Faulting module name: MSVCR100.dll, version: 10.0.40219.1, time stamp: 0x4d5f034a
Exception code: 0x40000015
Fault offset: 0x00000000000761c9
Faulting process id: 0x520
Faulting application start time: 0x01cf12c7bc49c3e7
Faulting application path: C:\Program Files\UrBackup\UrBackupClientBackend.exe
Faulting module path: C:\Windows\system32\MSVCR100.dll
Report Id: 28f4db85-7ebb-11e3-a878-b8ac6f8f5c18



- System   

  - Provider   

   [ Name]  Application Error 
 
  - EventID 1000   

   [ Qualifiers]  0 
 
   Level 2 
 
   Task 100 
 
   Keywords 0x80000000000000 
 
  - TimeCreated   

   [ SystemTime]  2014-01-16T14:33:27.000000000Z 
 
   EventRecordID 48544 
 
   Channel Application 
 
   Computer <nah>
 
   Security 
   

- EventData   

   UrBackupClientBackend.exe 
   0.0.0.0 
   529d0b91 
   MSVCR100.dll 
   10.0.40219.1 
   4d5f034a 
   40000015 
   00000000000761c9 
   520 
   01cf12c7bc49c3e7 
   C:\Program Files\UrBackup\UrBackupClientBackend.exe 
   C:\Windows\system32\MSVCR100.dll 
   28f4db85-7ebb-11e3-a878-b8ac6f8f5c18 

Ubuntu server urbackup.log:

2014-01-16 08:31:48: ERROR: Constructing of filelist of "<nah>" failed - TIMEOUT(1)
2014-01-16 08:31:49: ERROR: Backup had errors. Deleting partial backup.
2014-01-16 08:33:09: ERROR: Pipe to client unexpectedly closed has_error=true
2014-01-16 08:33:09: ERROR: Backup failed
2014-01-16 08:33:22: WARNING: Connecting to ClientService of "<nah>" failed: Sending logdata to client failed
2014-01-16 08:39:53: ERROR: Constructing of filelist of "<nah>" failed - TIMEOUT(1)
2014-01-16 08:39:54: ERROR: Backup had errors. Deleting partial backup.
2014-01-16 08:40:06: WARNING: Connecting to ClientService of "<nah>" failed: Sending logdata to client failed

Any suggestions to get this functioning again? It was working for many months without issue. There are 3 boxes still backing up fine, and 3 that are failing with the same problem.
The ones that are working are
Windows 2008
Windows 8 workstation
Windows 2003

The ones that are failing are
Windows 2008
Windows 2003

Sorry it it crashing.
Can you have a look at the client side log file (Default location C:\Program Files\UrBackup\debug.log)? If the crash is reproducible, can you change „warn“ to „debug“ in C:\Program Files\UrBackup\args.txt and then restart the „UrBackupBackend“ Service (or Windows). It should then log a lot more (debug messages). A log file can give me more details about your case. If you can give me the complete log file please send it zipped to martin@urbackup.org .
When crashing UrBackup will also save a crash dump (Minimized memory dump of the application during the crash). It will write in the log file where it saves the crash dump. If you can send me (to martin@urbackup.org ) that crash dump, that would be helpful as well.

Thank you for the crash dump and log file. Can you try the version here? https://sourceforge.net/projects/urbackup/files/Client/1.3.1WIP/

The service is no longer crashing! THANKS!

1 of the 3 machines immediately did a full file and image backup and that worked perfect.

2 of the 3 machines are now having a different problem. debug.log at http://pastebin.com/UbFAsCUP

I made sure to stop the service, kill the client app, uninstall urbackup, then installed your WIP version, stop service, kill client app, set to debug, start service, start client app

That log looks like it did not properly add the identity which could be a result of the fast reinstallation. Could you restart the server and then post the log again? Thanks!

I restarted the urbackup_srv and an additional box started backing up. It hasnt finished yet but I am confident it will succeed now. I have sent you an email with the debug log of what it did during this process if you wish to see it recovering from things.

The final box of the three failed to start backing up. After it failed to backup I restarted the windows service but it errors the same.

2014-01-21 12:14:54: ERROR: Ident reset (1)
2014-01-21 12:14:54: ERROR: Ident reset (1)
2014-01-21 12:35:16: WARNING: Info not found at ‘c:’ - reindexing
2014-01-21 12:35:52: ERROR: Writer NTDS has failure state VSS_WS_FAILED_AT_POST_SNAPSHOT with error VSS_E_WRITERERROR_NONRETRYABLE. UrBackup will continue with the backup but the associated data may not be consistent.
2014-01-21 12:35:52: ERROR: Writer is in error state during snapshot creation. Writer data may not be consistent.


2014-01-21 12:49:52: ERROR: Writer NTDS has failure state VSS_WS_FAILED_AT_POST_SNAPSHOT with error VSS_E_WRITERERROR_NONRETRYABLE. UrBackup will continue with the backup but the associated data may not be consistent.
2014-01-21 12:50:07: ERROR: Writer NTDS has failure state VSS_WS_FAILED_AT_POST_SNAPSHOT with error VSS_E_WRITERERROR_NONRETRYABLE. UrBackup will continue with the backup but the associated data may not be consistent.
2014-01-21 12:50:07: ERROR: Writer is in error state during snapshot creation. Writer data may not be consistent.

It looked like it wasnt backing up after those errors, but checking the urbackup web interface I see that it actually is backing up! yay!

Thank you very much for a great solution and the help!