ERROR: Indexing files failed, because of error

Urbackup Server 2.2.1 on Ubuntu 16.04
Urbackup Client 2.2.5 on Windows Server 2008 R2

client.log: (excerpt)
`
12:21:12: ClientService cmd: #I53HReZC8cSwQQrQtVdeF#2PING RUNNING pc_done=&status_id=8605&speed_bpms=0&total_bytes=-1&done_bytes=0&paused_fb=1#token=HzoHY4EoWdNfUMHOF8tN
12:21:12: ClientService cmd: #I53HReZC8cSwQQrQtVdeF#3START BACKUP group=0&running_jobs=1&sha=528&with_permissions=1&with_scripts=1&with_orig_path=1&with_sequence=1&with_proper_symlinks=1&status_id=8605&async=1#token=HzoHY4EoWdNfUMHOF8tN
12:21:12: rc=0 hasError=true state=0
12:21:12: ClientService cmd: #I53HReZC8cSwQQrQtVdeF#WAIT FOR INDEX async_id=74c46b7b32ff3bad17e6529a0a0738c2#token=HzoHY4EoWdNfUMHOF8tN
12:21:12: Wait for async index 74c46b7b32ff3bad17e6529a0a0738c2

12:21:23 Creating Shadowcopy of “C” in indexDirs
12:21:35: Shadowcopy path: \?\GLOBALROOT\Device\HarddiskVolumeShadowCopy173
12:21:35: done.
12:21:35: Removing deleted directories from index for “c:”…
12:21:35: Scanning for changed hard links on volume of “C:”…

12:22:45 Changed dir: …
12:22:45 Indexing “C”
12:22:47 Indexing of “C” done. 167 filesystem lookups 3523 db lookups and 29 db updates

12:22:47: Creating shadowcopy of “D” in indexDirs()
12:22:54: Shadowcopy path: \?\GLOBALROOT\Device\HarddiskVolumeShadowCopy174
12:22:54: done.
12:22:54: Removing deleted directories from index for “d:”…
12:22:54: Scanning for changed hard links on volume of “D:”…

12:46:00: Disabling CBT on volume “D:”
12:46:00: Changed dir: …
12:46:02: Indexing “D”…

12:46:05: Deleting Shadowcopy for dir “C:”
12:46:05: Deleting shadowcopy for path “\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy174” -2
12:46:08: Deleting Shadowcopy for dir “D:”
12:46:09: ERROR: Indexing files failed, because of error
12:46:09: Script “C:\Program Files\UrBackup\postfileindex.bat” does not exist
12:46:09: Async index 74c46b7b32ff3bad17e6529a0a0738c2 finished with “error - stopped indexing 2”
`

it would be nice to know WHAT is the error ??

Sorry, that message might actually be a bug. Did you add a path to backup during indexing? The next one should work though…

As indexing takes roughly half an hour it may be possible that a user created an new directory…