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Install LR5.1.x and add the server in the services tab. Deploy a simple portlet app Upgrade the server to LR5.2.x ,remove the olf 5.1.x entry and add server for 5.2.x Try deploying the same portlet again Issue:deployment fails with below message through clean and build works fine. init: deps-module-jar: deps-ear-jar: deps-jar: library-inclusion-in-archive: library-inclusion-in-manifest: compile: compile-jsps: Deployment error: null See the server log for details. at org.netbeans.modules.j2ee.deployment.devmodules.api.Deployment.deploy(Deployment.java:198) at org.netbeans.modules.j2ee.ant.Deploy.execute(Deploy.java:103) at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288) at sun.reflect.GeneratedMethodAccessor104.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) at org.apache.tools.ant.Task.perform(Task.java:348) at org.apache.tools.ant.Target.execute(Target.java:357) at org.apache.tools.ant.Target.performTasks(Target.java:385) at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1337) at org.apache.tools.ant.Project.executeTarget(Project.java:1306) at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41) at org.apache.tools.ant.Project.executeTargets(Project.java:1189) at org.apache.tools.ant.module.bridge.impl.BridgeImpl.run(BridgeImpl.java:273) at org.apache.tools.ant.module.run.TargetExecutor.run(TargetExecutor.java:499) at org.netbeans.core.execution.RunClassThread.run(RunClassThread.java:151) Caused by: java.lang.NullPointerException at org.netbeans.modules.j2ee.deployment.plugins.spi.IncrementalDeployment.getDirectoryForNewApplication(IncrementalDeployment.java:141) at org.netbeans.modules.j2ee.deployment.impl.InitialServerFileDistributor.distribute(InitialServerFileDistributor.java:101) at org.netbeans.modules.j2ee.deployment.impl.TargetServer.initialDistribute(TargetServer.java:247) at org.netbeans.modules.j2ee.deployment.impl.TargetServer.deploy(TargetServer.java:599) at org.netbeans.modules.j2ee.deployment.devmodules.api.Deployment.deploy(Deployment.java:163) ... 16 more BUILD FAILED (total time: 0 seconds)