MRP计算不可预料错误怎么破

source:Kingdee.K3.MFG.PLN.App.MrpModel
message:Object reference not set to an instance of an object.
stacktrace: at Kingdee.K3.MFG.PLN.App.MrpModel.PolicyImpl.NetCalc.CreateNetDemandPolicy.GetBomMasterId(DemandData demandRowView, String& bomNumber)
at Kingdee.K3.MFG.PLN.App.MrpModel.PolicyImpl.NetCalc.CreateNetDemandPolicy.FillSupplyInfoForNetDemand(MrpPlanOrderBillView planOrderDataView, DemandData demandRowView, MaterialData materialRowView, SUPPLYMANAGEENTRY supplyInfoRowView)
at Kingdee.K3.MFG.PLN.App.MrpModel.PolicyImpl.NetCalc.CreateNetDemandPolicy.CreateNetDemandData(MrpDemandContext demandContextRow, SUPPLYMANAGEENTRY supplyInfoRow, Decimal dBaseDemandQty, Enu_ReleaseType releaseType)
at Kingdee.K3.MFG.PLN.App.MrpModel.PolicyImpl.NetCalc.CreateNetDemandPolicy.SplitDemandInfoBySupplyRule(MrpDemandContext demandContextRow, Decimal dShortQty)
at Kingdee.K3.MFG.PLN.App.MrpModel.PolicyImpl.NetCalc.CreateNetDemandPolicy.OnExecuteDataPolicy()
at Kingdee.K3.MFG.PLN.App.MrpModel.AbstractMrpDataPolicy.Execute()
at Kingdee.K3.MFG.PLN.App.MrpModel.LogicUnitImpl.Mrp.NetCalcLogicUnit.DoFirstSingleDataPolicy(MrpDemandDimContext mrpDemandDimContext)
at Kingdee.K3.MFG.PLN.App.MrpModel.LogicUnitImpl.Mrp.NetCalcLogicUnit.DoComputeLogicByLLC(Decimal dLevelProgress, AbstractDSQueueBuilder demandQueueBuilder, Int64 i)
at Kingdee.K3.MFG.PLN.App.MrpModel.LogicUnitImpl.Mrp.NetCalcLogicUnit.OnExecuteLogicUnit()
at Kingdee.K3.MFG.PLN.App.MrpModel.AbstractMrpLogicUnit.Execute()
at Kingdee.K3.MFG.PLN.App.Core.MrpComputeService.RunMrp(Context ctx, DynamicObject mrpDataObject, OperateOption option)