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This issue was reported manually by sony3002. It already has 1 duplicates Build: NetBeans Platform Dev (Build 201209240001) VM: Java HotSpot(TM) Client VM, 22.1-b02, Java(TM) SE Runtime Environment, 1.7.0_03-b05 OS: Windows 7 User Comments: sony3002: generating controler classes from entity classes, using new -->persistance wizard Stacktrace: java.lang.NullPointerException at org.netbeans.modules.j2ee.persistence.wizard.jpacontroller.JpaControllerUtil.guessField(JpaControllerUtil.java:581) at org.netbeans.modules.j2ee.persistence.wizard.jpacontroller.JpaControllerUtil.isRelationship(JpaControllerUtil.java:314) at org.netbeans.modules.j2ee.persistence.wizard.jpacontroller.JpaControllerGenerator$4.run(JpaControllerGenerator.java:408) at org.netbeans.modules.j2ee.persistence.wizard.jpacontroller.JpaControllerGenerator$4.run(JpaControllerGenerator.java:290) at org.netbeans.api.java.source.JavaSource$1.run(JavaSource.java:644) at org.netbeans.api.java.source.JavaSource$1.run(JavaSource.java:634)
Created attachment 136895 [details] stacktrace
It's nice if you can provide sample entity class source code, thanks.
it's either 7.2 or 7.3 issue(build 201209.., reported once, without additional details, set to P4 to collect more cases or get more details later.
Reported for 7.3.x or earlier, no new info since then -> closing as worksforme, please reopen in case you see it.