java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at de.cooperateproject.modeling.textual.xtext.runtime.editor.errorsignalization.ErrorSignalContext.createSignal(ErrorSignalContext.java:40)
at de.cooperateproject.modeling.textual.xtext.runtime.editor.CooperateCDOXtextEditor.handleCursorPositionChanged(CooperateCDOXtextEditor.java:64)

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