$ ./rhamt-cli.bat --input ../../simple-sample-app.ear --output ../../output --source weblogic --target eap:7 --packages com.acme
Using RHAMT at C:\Users\zk45wky\windup\rhamt-cli-4.2.0.Final\bin\..
Using Java at C:\Program Files\Java\jdk8
> Red Hat Application Migration Toolkit (RHAMT) CLI, version 4.2.0.Final.


Red Hat Application Migration Toolkit (RHAMT) CLI, version [  ] - by Red Hat, Inc. [ https://developers.redhat.com/products/rhamt/overview/ ]

RHAMT execution failed due to: null
java.lang.NullPointerException
        at org.jboss.windup.bootstrap.Bootstrap.prompt(Bootstrap.java:181)
        at org.jboss.windup.bootstrap.commands.windup.RunWindupCommand.runWindup(RunWindupCommand.java:275)
        at org.jboss.windup.bootstrap.commands.windup.RunWindupCommand.execute(RunWindupCommand.java:67)
        at org.jboss.windup.bootstrap.Bootstrap.executePhase(Bootstrap.java:520)
        at org.jboss.windup.bootstrap.Bootstrap.run(Bootstrap.java:340)
        at org.jboss.windup.bootstrap.Bootstrap.main(Bootstrap.java:106)