Upgrading error

Unexpected Error. Please click View Log>> for more details

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.Unzipper.contextPreInstallation(Unzipper.java:311)

          at com.adventnet.tools.update.installer.Unzipper.invokePreInstallationClasses(Unzipper.java:138)

          at com.adventnet.tools.update.installer.ApplyPatch.installPatch(ApplyPatch.java:273)

          at com.adventnet.tools.update.installer.ApplyPatch.run(ApplyPatch.java:223)

          at java.lang.Thread.run(Unknown Source)

Caused by: java.lang.OutOfMemoryError: Java heap space

Please help to resolve

Regards,

Narin