Data Protection Advisor: LAX error when trying to upgrade the datastore

The following error appears shortly after an upgrade is attempted on the DPA datastore:

Complete Error message:

Invocation of this Java Application has caused and InvocationTargetException. This application will now exit (LAX)

The Details tab gives the Java Lang error:

java.lang.NullPointerException
                at com.zerog.ia.installer.LifeCycleManager.getEnable8dot3(Unknown Source)
                at com.zerog.ia.installer.LifeCycleManager.a6(Unknown Source)
                at com.zerog.ia.installer.LifeCycleManager.executeApplication(Unknown Source)
                at com.zerog.ia.installer.Main.main(Unknown Source)
                at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
                at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
                at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
                at java.lang.reflect.Method.invoke(Method.java:498)
                at com.zerog.lax.LAX.launch(Unknown Source)
                at com.zerog.lax.LAX.main(Unknown Source)

This is not a DPA issue.
This problem can be caused when the registry key has been changed.
This can occur if an internal policy that is enabled by the customer's security team that restricted the registry key.

Note the unknown above: getEnable8dot3(Unknown Source)

To confirm, run the following command on a command prompt:

C:\Windows\system32>reg query HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem\ /v NtfsDisable8dot3NameCreation

This command resulted with the same message on both the application and datastore servers:

ERROR: The system was unable to find the specified registry key or value

The correct output looks like:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem
    NtfsDisable8dot3NameCreation    REG_DWORD    0x2

The customer's security/OS team must check and disable any internal policies on both the DPA application and datastore servers.

The Key (NtfsDisable8dot3NameCreation) must be created on the registries of both servers with the values "REG_DWORD    0x2."

The servers to be stopped and started in the correct sequence:

1. Stop the DPA application services:

   <install dir>\dpa\services\bin> dpa svc stop

2. Stop the DPA datastore services:

   <install dir>\dpa\services\bin> dpa svc stop

3. Start the DPA datastore services:

   <install dir>\dpa\services\bin> dpa svc start

4. Start the DPA application services:

   <install dir>\dpa\services\bin> dpa svc start

Allow some minutes before trying to access the UI and attempting the upgrade again.