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This bug was originally marked as duplicate of bug 255430, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE 8.1 (Build 201510222201) VM: Java HotSpot(TM) 64-Bit Server VM, 25.66-b17, Java(TM) SE Runtime Environment, 1.8.0_66-b17 OS: Windows 7 User Comments: jherkel: I tried to add some jar file to the "Java Sources Classpath" listbox Stacktrace: java.lang.NullPointerException at org.netbeans.modules.java.freeform.Classpaths.createExecuteClasspath(Classpaths.java:484) at org.netbeans.modules.java.freeform.Classpaths.access$500(Classpaths.java:126) at org.netbeans.modules.java.freeform.Classpaths$MutableClassPathImplementation.initRoots(Classpaths.java:608) at org.netbeans.modules.java.freeform.Classpaths$MutableClassPathImplementation.change(Classpaths.java:649) at org.netbeans.modules.java.freeform.Classpaths.pathsChanged(Classpaths.java:554) at org.netbeans.modules.java.freeform.Classpaths.configurationXmlChanged(Classpaths.java:538)
Created attachment 157354 [details] stacktrace
This bug already has 5 duplicates see http://statistics.netbeans.org/exceptions/detail.do?id=221185
Fixed jet-main 08333fd71527