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I experienced an issue when creating a Spring app with the preconfigured Spring library in NetBeans. I used AspectJ (thus asm libs). It was due to NetBeans' cglib in the Spring "library", which had some unresolved dependency and I got this exception: Initialization of bean failed; nested exception is java.lang.NoSuchMethodError: org.objectweb.asm.ClassWriter.<init>(I)V I suggest using cglib-nodep jar instead.