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java.lang.NullPointerException: 	at atg.commerce.order.purchase.PurchaseProcessFormHandler.getTransactionLockService(PurchaseProcessFormHandler.java:1722)	at atg.commerce.order.purchase.PurchaseProcessFormHandler.releaseTransactionLock(PurchaseProcessFormHandler.java:1694)	at atg.commerce.order.purchase.PurchaseProcessFormHandler.afterSet(PurchaseProcessFormHandler.java:1877)	at atg.droplet.EventSender.callAfterSet(EventSender.java:790)	at atg.droplet.FormTag.doSendEvents(FormTag.java:845)	at atg.droplet.FormTag.sendEvents(FormTag.java:675)	at atg.droplet.DropletEventServlet.sendEvents(DropletEventServlet.java:653)	at atg.droplet.DropletEventServlet.service(DropletEventServlet.java:681)	at atg.servlet.pipeline.PipelineableServletImpl.passRequest(PipelineableServletImpl.java:157)	at atg.commerce.order.CommerceCommandServlet.service(CommerceCommandServlet.java:150)	at atg.servlet.pipeline.PipelineableServletImpl.passRequest(PipelineableServletImpl.java:157)	at atg.commerce.promotion.PromotionServlet.service(PromotionServlet.java:213)	at atg.servlet.pipeline.PipelineableServletImpl.passRequest(PipelineableServletImpl.java:157)	at atg.userprofiling.AccessControlServlet.service(AccessControlServlet.java:696)	at atg.servlet.pipeline.PipelineableServletImpl.passRequest(PipelineableServletImpl.java:157)	at atg.servlet.sessionsaver.SessionSaverServlet.service(SessionSaverServlet.java:2452)	at atg.servlet.pipeline.PipelineableServletImpl.passRequest(PipelineableServletImpl.java:157)	at atg.userprofiling.PageEventTriggerPipelineServlet.service(PageEventTriggerPipelineServlet.java:191)