Flexible Engine - File and Application Backup user guide


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Troubleshooting guide




What to do when getting an error…






Understanding the error codes

Error code Description
2 Installation was canceled
3 Requires a reboot for completing the installation
11 The specified client name is in use
15 Detected an unfinished install
18 Available disk space is low
31 Multi instance not allowed
43 Failed to install package
44 Failed to start services
59 Failed to register client
128 No available CVD port
137 Reboot required for Windows update
141 Anti-virus blocking installation





Checking the logs


Logs files can be found on the host under below path:
For Windows: C:\Program Files\Commvault\ContentStore\Log Files\
For Linux : /var/log/commvault/Log_Files/


Below is the name and description of log files that can be used to troubleshoot various issues.

Log file Name Description
Install.log Installation log file *
clBackup.log File System backup log file
clRestore.log Restore log file
extidbdiscover.log Initial Exchange DB discovery log file
extidbbackup.log Exchange backup log file
SQLiDA.log SQL backup log file
vsbackup.log Virtual server agent backup log file
Vsrst.log Virtual server agent restore log file
vsrst.log New restore log file for Virtual server agent



* for Windows if Log folder is not created for some reason during installation then, install log can be found in this location C:\ProgramData\Commvault Systems\Galaxy\LogFiles\Install.log.

Note: ProgramData is a hidden folder ; you need to enable the Windows “show hidden folders” options





Checking the Jobs


At first, it’s important to have a look at the job activity.
Look for the implied job, and check for events.
It may be relevant for deeper analysis on the jobs activity, to have a look at the events.
As explained in the Jobs Activity follow up chapter, you may find events related to each job within the job activity log.
Otherwise, you may also require having a more global look at the activity, by checking on all events occurring for your Company:

  • In the FAB Backup console, go to the Monitoring / Events section




Depending on the case, and for further analysis, acquiring the job logs could be interesting (see the Active Jobs chapter).
Here follows a list of possible encountered errors and the action to be taken

Error Action to be taken
Source could not start the command Check the network settings on the source computer
Destination could not start the command Check the network settings on the destination computer
Services on destination are down Make sure that the necessary services are up and running on the destination client computer (see FAB Services / daemons section)
Services on source are down Make sure that the necessary services are up and running on the source client computer (see FAB Services / daemons section)
Connect timed out Check the connectivity between the source and destination computers in this message and make sure that you can ping these computers from one another
Job Result Folder has low capacity Increase capacity
Base Folder has low capacity Increase capacity
Authentication failed Make sure the proper authentication was used
Firewall connect failed. Source client <n> is not listed in the firewall config file. Make sure that the firewall config file is correct and check if this client is listed in the file





Check readiness


Often backups are pending due to a lack of communication between the FAB infrastructure and the agent located on the client to backup.
Such communication may be verified through the check readiness command:

  • In the FAB Backup console, go to the Manage / Servers section





  • Locate the concerned agent click on its action button, and click on Check Readiness





  • Wait for the operation to complete and look for possible errors reported








FAB Services / daemons


Backup services on the clients have to be up and running for any backup & restore operation. Below is the list of services (name, process, description and log files).

Windows Service Name Processes
(Linux / Windows)
Description Log file
Commvault Communications Service (GxCVD) CVD Base Service, Provides the ability to fetch or save metadata on the CommServe when backup or restore are in progress. CVD.log
Commvault Network Daemon (GxFWD) Cvfwd File System backup log file Cvfwd.log
Commvault Client Manager Service (GXClMgrS) ClMgrS Responsible for archiving or recovering the files ClMgrS.log
N/A cvlaunchd Linux Process only – Responsible for spawning Commvault processes cvlaunchd.log





On your Windows devices, the FAB service management is done as follows :


Open the Windows Start menu -> expand the Commvault start menu folder -> click on Commvault Process Manager -> go to services tab.





From this pane, your client services can be started, stopped, and restarted using the button at the bottom.





On your Linux devices, the FAB service management is done as follows :


Verify services:


Run the commvault -all list as root user





To stop service run commvault -all stop as root user
To start service run commvault -all start as root user
To restart service commvault -all restart as root user




Looking for alerts




FAB logs all alerts set for you Company.
When analyzing an error, it could be relevant to have a look at the alerts:

  • In the FAB Backup console, go to the Monitoring / Alerts section





Note: The “No data available” message indicates that no alert was sent the past 7 days



You may subscribe to pre-defined alerting policies:

  • In Monitoring / Alerts section, click on Alerts definitions





  • Click on the Alert definition you wish to setup





  • In the Alert target section, click on Edit





  • Select the options you require and click on Save





Note: Make sure your desired alerts are enabled in the Alerts definitions section (checkbox Enabled)





Microsoft 365 sync issues


Microsoft 365 clients (Exchange Online, SharePoint Online, OneDrive for Business and Teams) are synchronized once during the initial configuration, Any Users, sites etc created after the client configuration might not be visible on the FAB console.


  • In the FAB Backup console, under the Protect / Applications / Office 365 section, click on the MS 365 App name
  • Click on the Add Mailbox / Add sites / Add user / Add team (depending on the O365 solution in question) window
  • Click on the message “Showing…” and then on Refresh Cache in the Discover cache info window: