Check if the affected computer was switched off, hibernated or in standby mode when the scheduled backup is due to run (e.g. computer shutdown after office hour, but backup schedule configured to a time after office hour).

Ensure that the AhsayCBS server and AhsayOBM / ACB client application are running on the latest stable release, to rule out issues that are already resolved.

Refer to the following article for instruction on how to patch the server and client application:

How to install the latest patch set for AhsayCBS?

How to install the latest patch set for AhsayOBM / AhsayACB?

Ensure that the Ahsay Online Backup Manager Service are started or can be started properly:

Check if the scheduler service is running by inspecting the client side scheduler debug log.

Refer to the following article for location of the Scheduler Debug Logs (debug.log):

Where are the backup client application logs stored at?

The scheduler debug log contain every details of the scheduler service. If the schedule is running properly, the log will contain entries similar to the following example:

[YYYY/MM/DD hh:mm:ss][info][Thread][Reloader] Loading profile from server ...
[YYYY/MM/DD hh:mm:ss][info] Loading profile...
[YYYY/MM/DD hh:mm:ss][info] Loading profile from server ...
[YYYY/MM/DD hh:mm:ss][info] Loading profile from server ... Completed
[YYYY/MM/DD hh:mm:ss][info] Loading profile... Completed
[YYYY/MM/DD hh:mm:ss][info] Profile is reloaded from server. Reloading scheduler ...
[YYYY/MM/DD hh:mm:ss][info] [BackupSet (Backup_ID)] Next backup will run in x hr x min x sec.
[YYYY/MM/DD hh:mm:ss][info] Profile is reloaded from server. Reloading scheduler ... Completed

If no log entry is written to the debug log, try to restart the service with the following procedure:

For client installation on Windows, in Control Panel go to Administrative Tools > Services > Ahsay Online Backup Manager Services.

For client installation on Linux, enter the following command:

# /etc/init.d/obmscheduler stop
# /etc/init.d/obmcheduler start

For client installation on Mac OS X 10.7 to 10.9, enter the following command in Terminal:

$ sudo SystemStarter stop AhsayOBM
$ sudo SystemStarter start AhsayOBM

For client installation on Mac OS X 10.10 or above, enter the following command in Terminal:

$ sudo launchctl unload /Library/LaunchDaemons/com.AhsayOBM.scheduler.plist
$ sudo launchctl load -w /Library/LaunchDaemons/com.AhsayOBM.scheduler.plist

Ensure that the 'Run scheduled backup for this backup set' setting is enabled on the corresponding client computer.

Login to the AhsayOBM user interface, select Backup Sets, then the corresponding backup set, and Backup Schedule to confirm:

Check on the AhsayCBS web console to determine if the schedule is configured for the correct client computer.

In the scheduler debug log, check if entries similar to the following example can be found:

[YYYY/MM/DD hh:mm:ss][info][BackupSet (Backup_ID)] Next backup will run in 0 hr 1 min 0 sec
[YYYY/MM/DD hh:mm:ss][info][BackupSet (Backup_ID)] Skipping scheduled backup on this computer. Schedule should run on ComputerName-A, current computer name: ComputerName_B

For each backup set, the scheduler service will verify if the computer name (of the machine where the scheduler service is running) is the same as the computer name specified in the backup set setting.

If the computer name of the client computer had changed, the scheduled backup job will be skipped by the scheduler service, because of the mismatch.

To resolve the issue, ensure that the scheduled backups on the corresponding machine are configured properly, make sure that the correct computer name has been set in the AhsayCBS web console for the relevant backup set.

Go to Users, Groups & Policies > Backup User > %username% > Backup Set > Backup Schedule:

Ensure that the timezone setting of the corresponding backup account is correctly configured.

In some cases, a missed backup job alert is received for a backup job that was actually performed at the scheduled time (but at an incorrect time).

For these cases, check if the timezone setting of the corresponding backup account is correctly setup.

Login to the AhsayCBS web console, go to Users, Groups & Policies > Backup User > %username% > User Profile > General, check the Timezone setting.

Check if the home.txt has been populated correctly, the home.txt is located at the AhsayOBM / ACB installation folder, except for installation on WIndows, the home.txt file is located at:

C:\ProgramData\AhsayOBM\home.txt

Within the file, you should see at least one entry pointing to a .obm / .acb directory that is accessible by the local scheduler service, for example "C:\Users\administrator\.obm". Modify the home.txt file by adding the directory path to the .obm folder, if the file is empty.

For AhsayOBM installation on Linux, you must configure the client login setting by running the RunConfigurator.sh script at least once:

To resolve the issue, refer to the following steps:

1. Enter the following command in terminal:

   $ sudo vi /etc/hostconfig
   

2. Edit the file by adding the following entry to the hostconfig file:

   HOSTNAME=%your_computer_name%
   

3. Restart the computer.

Once the computer is restarted, check on the scheduler debug log to confirm if the correct hostname is picked up by the scheduler service.

Ensure that there are sufficient free memory available on the client computer for the backup to begin.

Check if entries similar to the following example can be found at the scheduler debug log:

[YYYY/MM/DD hh:mm:ss][info][AhsayOBM.OutputStream][Backup Set] Error occurred during initialization of VM
[YYYY/MM/DD hh:mm:ss][info][AhsayOBM.OutputStream][Backup Set] Could not reserve enough space for object heap

Increase the memory allocation setting with the instructions provided in the following article:

How do I modify the Java heap size setting of AhsayOBM or AhsayACB?

Check if 'Mirrored Folders' is enabled for Desktop:

In some cases, scheduled backup may not run with this option enabled, please disable the option to resolve the issue.