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This bug was originally marked as duplicate of bug 231659, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE 7.4 (Build 201310111528) VM: Java HotSpot(TM) 64-Bit Server VM, 24.45-b08, Java(TM) SE Runtime Environment, 1.7.0_45-b18 OS: Windows 7 User Comments: EduardKarelEtc: saving a mdofied file or running a file triggers the exception. this is a fresh install of the IDE GUEST: server log problem Stacktrace: java.lang.NullPointerException at org.glassfish.tools.ide.server.config.ConfigBuilderProvider.getBuilderConfig(ConfigBuilderProvider.java:97) at org.glassfish.tools.ide.server.config.ConfigBuilder.fetch(ConfigBuilder.java:249) at org.glassfish.tools.ide.server.config.ConfigBuilder.getJavaSEConfig(ConfigBuilder.java:321) at org.netbeans.modules.glassfish.javaee.Hk2JavaEEPlatformFactory.getJ2eePlatformImpl(Hk2JavaEEPlatformFactory.java:194) at org.netbeans.modules.j2ee.deployment.impl.ServerInstance.getJ2eePlatformImpl(ServerInstance.java:347) at org.netbeans.modules.j2ee.deployment.impl.query.J2eePlatformSourceForBinaryQuery.findSourceRoots2(J2eePlatformSourceForBinaryQuery.java:103)
Created attachment 142740 [details] stacktrace
Which server version do you use?
*** This bug has been marked as a duplicate of bug 254417 ***