Netbeans javac throws exception in LayerGeneratingProcessor for @Override. Where's the problem?

Im using NB7 I don't know which file is causing the problem since i can't find any stracktraces. I've checked the .netbeans\7.0\var\log\ directory, but there's no useful informatio开发者_运维知识库n there (afaik) I added to build-impl.xml the compilerarg -verbose and got

...
[loading java\lang\annotation\RetentionPolicy.class(java\lang\annotation:RetentionPolicy.class)]
Round 1:
    input files: {...}
    annotations: [java.lang.Override, java.lang.SuppressWarnings]
    last round: false
error: Exception thrown while constructing Processor object: org/openide/filesystems/annotations/LayerGeneratingProcessor
D:\..\nbproject\build-impl.xml:603: The following error occurred while executing this line:
D:\..\nbproject\build-impl.xml:242: Compile failed; see the compiler error output for details.
BUILD FAILED (total time: 8 seconds)

Turns out the "LayerGeneratingProcessor" is an Abstract class. Does anyone know how to stop it from being constructed ?

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Solved

Problem was that the tickbox 'Enable annotation processing', under 'Project properties, build, compiling ', was enabled while nothing was configured for this setting.