When click on Attachment button on OAF Sourcing RFQ page it show error
oracle.apps.fnd.framework.OAException: java.lang.ClassCastException: oracle.apps.fnd.framework.webui.beans.layout.OADefaultSingleColumnBean incompatible with oracle.apps.fnd.framework.webui.beans.layout.OAPageLayoutBean
at oracle.apps.fnd.framework.OAException.wrapperException(OAException.java:912)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:616)
at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:251)