Following error message is displayed in Terminal when we are starting the Tomcat server:

Exception in thread "com.liferay.portal.kernel.deploy.auto.AutoDeployScanner" java.lang.NullPointerException
at com.liferay.portal.kernel.deploy.auto.AutoDeployDir.scanDirectory(AutoDeployDir.java:214)
at com.liferay.portal.kernel.deploy.auto.AutoDeployScanner.run(AutoDeployScanner.java:54)

After starting the server it is displaying the message.
I also pasted the XML file in Deploy folder of Tomcat path and then restated the server, but to vain.

Thanks in Advance.

Did you change the deploy directory in portal-ext.properties to a directory that doesn't exist?

The Problem was solved.

Remove liferay portal (tomcat server) folder and replace with new one. When we start the server it will go to deploy folder for registration then at that time paste the XML file received after downloading Liferay 6.1 Enterprise Edition in Deploy folder of liferay portal (tomcat server) folder. Then it will get registered.

06:25:59,822 INFO [AutoDeployDir:84] Creating missing directory /EnterpriseEdition/newportal/deploy

06:25:59,824 INFO [AutoDeployDir:105] Auto deploy scanner started for /EnterpriseEdition/newportal/deploy

26 Mar, 2012 6:26:07 AM org.apache.coyote.AbstractProtocol start

INFO: Starting ProtocolHandler ["http-bio-8080"]

26 Mar, 2012 6:26:07 AM org.apache.coyote.AbstractProtocol start

INFO: Starting ProtocolHandler ["ajp-bio-8009"]

26 Mar, 2012 6:26:07 AM org.apache.catalina.startup.Catalina start

INFO: Server startup in 47197 ms

06:26:13,343 INFO [AutoDeployDir:167] Processing license-portaldevelopment- developer-6.1-triallicenses.xml

06:26:13,400 INFO [LicenseAutoDeployListener:?] Copying license for /EnterpriseEdition/newportal/deploy/lic ense-portaldevelopment-developer-6.1-triallicenses.xml

06:26:13,470 INFO [LicenseManager:?] Portal Development license validation passed

06:26:13,471 INFO [a:?] License registered

09:11:02,518 INFO [PluginPackageUtil:1409] Checking for available updates

09:11:02,519 INFO [PluginPackageUtil:1453] Finished checking for available updates in 0 ms