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Build: NetBeans 3.4 beta 1 Java versrion: JDK 1.4.0_01 - start netbeans ('Default Compiler' set to 'External Compilation') - tools/option/editing/java sources/default compiler='(do not compile)' - Close options - Select any node in explorer that has a Java class in it. A NullPointerException will be thrown (repeatedly) from line 212 of org.netbeans.modules.java.JavaDataObject.java. (You will get the NPEs straight away if you had a java file open or an explorer node with java classes in it selected) The problem occurs whenever you set the Default Compiler to 'Indirect Ant', 'Ant Script' or 'Do not comile'. It does not occur when you set the Default Compiler to 'External', 'Internal', 'Fastjavac' or 'Jikes'.
Created attachment 6177 [details] Stacktrace for NPE
*** This issue has been marked as a duplicate of 24585 ***
Resolved for 3.4.x or earlier, no new info since then -> closing.