Resolution:
Description
=========
The following error was observed while upgrading a 5.5 domain to 5.7:

2010 déc. 03 10:49:02:179 GMT -0500 DU Error [DomainUtility] AESDKJ-0000 java.lang.NullPointerException
    at com.tibco.administrator.du.task.migration.UpgradeTo57.if(UpgradeTo57.java:774)
    at com.tibco.administrator.du.task.migration.UpgradeTo57.upgrade(UpgradeTo57.java:108)
    at com.tibco.administrator.du.task.migration.MigrateTo57Task.execute(MigrateTo57Task.java:61)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at com.tibco.administrator.wizard.progress.Trampoline.invoke(Trampoline.java:96)
    at com.tibco.administrator.wizard.progress.BusyWait.run(BusyWait.java:267)
    at java.lang.Thread.run(Thread.java:662)


Resolution:
=========
Add the following empty property to the hawkagent_domain.tra file:
     tibco.env.JVM_LIB_PATH