Description:
traUpgradeManager throws NullPointerException when changing RV version.

Symptoms:
<------------
/tibco/tra/5.6/bin#>./traUpgradeManager -path /tibco -rv /tibco/tibrv/8.4
WRAPPER - start method threw an exception
Exception in thread "main" java.lang.NullPointerException
        at com.tibco.administrator.command.tool.TraUpgradeManager.a(TraUpgradeManager.java:84)
        at com.tibco.administrator.command.tool.TraUpgradeManager.a(TraUpgradeManager.java:91)
        at com.tibco.administrator.command.tool.TraUpgradeManager.main(TraUpgradeManager.java:61)
------>
Cause:
One possible reason is there is folder which contains special character in its name under the specified folder. For instance, a folder named  "lost+found" might cause this NullPointerException.