Unable to move from 124196 to build 125007

Hi all, following step-by-step installation procedure i'm still unable to upgrade from 12.4.196 to 12.5.007 with the following message. Coudl you please help?

Thanks in advance.

Regards.

Unexpected Error
java.lang.reflect.InvocationTargetException
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
   at java.lang.reflect.Method.invoke(Unknown Source)
   at com.adventnet.tools.update.installer.RevertPatch.myContextPrePostUnInstallation(RevertPatch.java:492)
   at com.adventnet.tools.update.installer.RevertPatch.revertPreInvocationClasses(RevertPatch.java:669)
   at com.adventnet.tools.update.installer.Unzipper.failureRevertAbsolute(Unzipper.java:616)
   at com.adventnet.tools.update.installer.Unzipper.contextPreInstallation(Unzipper.java:390)
   at com.adventnet.tools.update.installer.Unzipper.invokePreInstallationClasses(Unzipper.java:140)
   at com.adventnet.tools.update.installer.ApplyPatch.installPatch(ApplyPatch.java:314)
   at com.adventnet.tools.update.installer.ApplyPatch.run(ApplyPatch.java:242)
   at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
   at com.adventnet.me.opmanager.operations.server.PostgresPreProcessor.revert(PostgresPreProcessor.java:327)
   ... 12 more