MR Failed to generate all the reports

MR was running good, but today we found in the reports queue, all the reports have the status : Failed

check the log file, it shows me "System.NullReferenceException: Object reference not set to an instance of an object."

Anyone can help me or guide me? 

Thanks

The followings are the detail error message

Microsoft.Dynamics.Performance.DataProvider.Core.RequestException: The source system request did not complete successfully. ---> System.NullReferenceException: Object reference not set to an instance of an object.
at Microsoft.Dynamics.Performance.DataProvider.GeneralLedger.DataMart.Data.DimensionMemberAccessBase`3.FindCurrent(MultiMap`2 multiMap, String name)
at Microsoft.Dynamics.Performance.DataProvider.GeneralLedger.DataMart.Data.AccountFilterTransformer.FillDimensionFilterSet(Dictionary`2 dimensionFilterSet, GLSegmentCriteria accountCriteria)
at Microsoft.Dynamics.Performance.DataProvider.GeneralLedger.DataMart.Data.AccountFilterTransformer.FillDimensionFilterSet(Dictionary`2 dimensionFilterSet, GLFilterCriteria filterCriteria)
at Microsoft.Dynamics.Performance.DataProvider.GeneralLedger.DataMart.Data.AccountFilterTransformer.FillDimensionFilterSet(Dictionary`2 dimensionFilterSet, GLFilterCriteria filterCriteria)
at Microsoft.Dynamics.Performance.DataProvider.GeneralLedger.DataMart.Data.AccountFilterTransformer.FillScratchTempTable(GLAccountFilterCollection accountFilters)
at Microsoft.Dynamics.Performance.DataProvider.GeneralLedger.DataMart.Data.BalanceRequestHandler.CreateReaders(GLProvider provider, SqlConnection connection)
at Microsoft.Dynamics.Performance.DataProvider.GeneralLedger.DataMart.GLProvider.HandleBalanceRequest(GLBalanceRequest request)
at Microsoft.Dynamics.Performance.DataProvider.GeneralLedger.GLSystemProvider.HandleRequest(GLBalanceRequest request)
at Microsoft.Dynamics.Performance.DataProvider.Core.SourceSystemRequest.Handle[TRequest](SourceSystemProvider provider, TRequest request)
at Microsoft.Dynamics.Performance.DataProvider.Core.SourceSystemProvider.SubmitRequest(SourceSystemRequest request)
--- End of inner exception stack trace ---
at Microsoft.Dynamics.Performance.DataProvider.Core.SourceSystemProvider.SubmitRequest(SourceSystemRequest request)
at Microsoft.Dynamics.Performance.DataProvider.Core.SourceSystemProvider.HandleSubmit(SourceSystemRequest request)
at Microsoft.Dynamics.Performance.DataProvider.Core.SourceSystemConnection.Submit(SourceSystemRequest request)
at Microsoft.Dynamics.Performance.Reporting.DataProvider.Server.DirectLinkService.SubmitRequestDirect(SourceSystemConnection connection, GLRequest request)
at Microsoft.Dynamics.Performance.Reporting.Engine.Server.ProviderLink.SubmitRequest(GLRequest request, ProviderConnection context)
at Microsoft.Dynamics.Performance.Reporting.Engine.Server.ProviderLink.SubmitBalanceRequest(ProviderConnection context, GLBalanceRequest balanceRequest)
at Microsoft.Dynamics.Performance.Reporting.Engine.Server.GLLinkAdapter.RetrieveGLDataBatch(Int32 rowNumber)
at Microsoft.Dynamics.Performance.Reporting.Engine.Server.GLLinkAdapter.GetData()



System.NullReferenceException: Object reference not set to an instance of an object.
at Microsoft.Dynamics.Performance.DataProvider.GeneralLedger.DataMart.Data.DimensionMemberAccessBase`3.FindCurrent(MultiMap`2 multiMap, String name)
at Microsoft.Dynamics.Performance.DataProvider.GeneralLedger.DataMart.Data.AccountFilterTransformer.FillDimensionFilterSet(Dictionary`2 dimensionFilterSet, GLSegmentCriteria accountCriteria)
at Microsoft.Dynamics.Performance.DataProvider.GeneralLedger.DataMart.Data.AccountFilterTransformer.FillDimensionFilterSet(Dictionary`2 dimensionFilterSet, GLFilterCriteria filterCriteria)
at Microsoft.Dynamics.Performance.DataProvider.GeneralLedger.DataMart.Data.AccountFilterTransformer.FillDimensionFilterSet(Dictionary`2 dimensionFilterSet, GLFilterCriteria filterCriteria)
at Microsoft.Dynamics.Performance.DataProvider.GeneralLedger.DataMart.Data.AccountFilterTransformer.FillScratchTempTable(GLAccountFilterCollection accountFilters)
at Microsoft.Dynamics.Performance.DataProvider.GeneralLedger.DataMart.Data.BalanceRequestHandler.CreateReaders(GLProvider provider, SqlConnection connection)
at Microsoft.Dynamics.Performance.DataProvider.GeneralLedger.DataMart.GLProvider.HandleBalanceRequest(GLBalanceRequest request)
at Microsoft.Dynamics.Performance.DataProvider.GeneralLedger.GLSystemProvider.HandleRequest(GLBalanceRequest request)
at Microsoft.Dynamics.Performance.DataProvider.Core.SourceSystemRequest.Handle[TRequest](SourceSystemProvider provider, TRequest request)
at Microsoft.Dynamics.Performance.DataProvider.Core.SourceSystemProvider.SubmitRequest(SourceSystemRequest request)