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java.lang.NullPointerException: 	at org.springframework.ide.eclipse.beans.core.internal.model.BeansConfigSet.getBean(BeansConfigSet.java:227)	at org.springframework.ide.eclipse.beans.core.internal.model.BeansModelUtils.getBean(BeansModelUtils.java:719)	at org.springframework.ide.eclipse.webflow.core.internal.model.WebflowModelUtils.isReferencedBeanFound(WebflowModelUtils.java:217)	at org.springframework.ide.eclipse.webflow.core.internal.model.validation.rules.ActionValidationRule.validate(ActionValidationRule.java:46)	at org.springframework.ide.eclipse.webflow.core.internal.model.validation.rules.ActionValidationRule.validate(ActionValidationRule.java:1)