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java.lang.NullPointerException: 	at org.compiere.util.DB.prepareStatement(DB.java:732)	at org.compiere.util.DB.getSQLValueTSEx(DB.java:1518)	at org.compiere.model.MCostDetail.setDateAcct(MCostDetail.java:1483)	at org.compiere.model.MCostDetail.beforeSave(MCostDetail.java:1546)	at org.compiere.model.PO.save(PO.java:2062)	at org.compiere.model.PO.saveEx(PO.java:2207)	at org.adempiere.engine.StandardCostingMethod.updateAmountCost(StandardCostingMethod.java:378)	at org.adempiere.engine.StandardCostingMethod.createCostDetail(StandardCostingMethod.java:222)	at org.adempiere.engine.StandardCostingMethod.process(StandardCostingMethod.java:234)	at org.adempiere.engine.CostEngine.createCostDetail(CostEngine.java:432)	at org.adempiere.engine.CostEngine.createCostDetail(CostEngine.java:256)	at org.compiere.model.MTransaction.afterSave(MTransaction.java:237)	at org.compiere.model.PO.saveFinish(PO.java:2239)	at org.compiere.model.PO.saveNew(PO.java:2812)	at org.compiere.model.PO.save(PO.java:2123)	at org.compiere.model.PO.save(PO.java:2312)	at org.compiere.model.MProjectIssue.process(MProjectIssue.java:170)	at org.compiere.process.ProjectIssue.issueMovement(ProjectIssue.java:176)	at org.compiere.process.ProjectIssue.doIt(ProjectIssue.java:120)	at org.compiere.process.SvrProcess.process(SvrProcess.java:147)	at org.compiere.process.SvrProcess.startProcess(SvrProcess.java:105)