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Values must not be empty
java.lang.IllegalArgumentException: at least one goal must be specified	at org.apache.commons.lang3.Validate.notEmpty(Validate.java:251)	at org.springframework.roo.project.Execution.(Execution.java:48)	at org.springframework.roo.project.Plugin.getExecutions(Plugin.java:137)	at org.springframework.roo.project.Plugin.(Plugin.java:182)	at sun.reflect.GeneratedConstructorAccessor11.newInstance(Unknown Source)	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)	at org.springframework.roo.project.maven.PomFactoryImpl.parseElements(PomFactoryImpl.java:164)	at org.springframework.roo.project.maven.PomFactoryImpl.getInstance(PomFactoryImpl.java:90)	at org.springframework.roo.project.PomManagementServiceImpl.parseUnparsedPoms(PomManagementServiceImpl.java:206)	at org.springframework.roo.project.PomManagementServiceImpl.updatePomCache(PomManagementServiceImpl.java:336)	at org.springframework.roo.project.PomManagementServiceImpl.getFocusedModule(PomManagementServiceImpl.java:108)	at org.springframework.roo.project.PomManagementServiceImpl.getFocusedModuleName(PomManagementServiceImpl.java:116)	at org.springframework.roo.project.AbstractProjectOperations.getFocusedModuleName(AbstractProjectOperations.java:494)	at org.springframework.roo.project.AbstractProjectOperations.isFocusedProjectAvailable(AbstractProjectOperations.java:595)	at org.springframework.roo.classpath.operations.HintOperationsImpl.determineTopic(HintOperationsImpl.java:49)	at org.springframework.roo.classpath.operations.HintOperationsImpl.hint(HintOperationsImpl.java:101)	at org.springframework.roo.classpath.operations.HintCommands.hint(HintCommands.java:26)	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 org.springframework.roo.process.manager.ProcessManagerHostedExecutionStrategy$1.callback(ProcessManagerHostedExecutionStrategy.java:46)	at org.springframework.roo.process.manager.internal.DefaultProcessManager.doTransactionally(DefaultProcessManager.java:169)	at org.springframework.roo.process.manager.internal.DefaultProcessManager.execute(DefaultProcessManager.java:226)	at org.springframework.roo.process.manager.ProcessManagerHostedExecutionStrategy.execute(ProcessManagerHostedExecutionStrategy.java:43)	at org.springframework.roo.shell.AbstractShell.executeCommandImpl(AbstractShell.java:225)	at org.springframework.roo.shell.AbstractShell.executeCommand(AbstractShell.java:135)	at org.springframework.roo.shell.jline.JLineShell.promptLoop(JLineShell.java:420)	at org.springframework.roo.shell.jline.JLineShell.run(JLineShell.java:538)	at java.lang.Thread.run(Thread.java:662)