Error coming in some users ssrs report opening

at Report server this error is coming.Error is coming some time some time reports are opening.

AXRDCE The AXRDCE extension caught an unexpected exception for report ProdReport.Copy2OfReport.
The error message was:
A call to the Microsoft Dynamics AX SRSFrameworkService service failed. Failed to logon to Microsoft Dynamics AX..
   at Microsoft.Dynamics.AX.Framework.Services.Client.ServiceClientHelper.InvokeChannelOperation[TResult,TChannel](IServiceClient`1 client, Func`2 operationInvoker, Func`2 exceptionWrapper)
   at Microsoft.Dynamics.AX.Framework.Reporting.Shared.SRSFrameworkServiceProxy.Microsoft.Dynamics.AX.Framework.Reporting.Shared.IXppSRSFrameworkService.getRelationLinkTargetList(SRSFrameworkServiceGetRelationLinkTargetListRequest request)
   at Microsoft.Dynamics.AX.Framework.Reporting.Shared.SRSFrameworkServiceClient.Microsoft.Dynamics.AX.Framework.Reporting.Shared.ISRSFrameworkService.GetRelationLinkTargetList(String tableFieldsListEncodedStr)
   at Microsoft.Dynamics.AX.Framework.Reporting.Shared.TableFieldMenuItemService.GetRelationLinkTargetList(String fieldList)
   at Microsoft.Dynamics.AX.Framework.Reporting.Shared.TableFieldMenuItemService.Resolve(String encodedString)
   at Microsoft.Dynamics.AX.Framework.Reporting.Shared.AutomaticDrillThroughStep.Transform(XDocument report, ILocalReportContext reportContext, ILocalUserContext userContext)
   at Microsoft.Dynamics.AX.Framework.Reporting.Shared.CustomizationExtensionImplementation.ProcessReportDefinition(Byte[] reportDefinition, ILocalReportContext reportContext, ILocalUserContext userContext, Byte[]& reportDefinitionProcessed)

A call to the Microsoft Dynamics AX SRSFrameworkService service failed. Failed to logon to Microsoft Dynamics AX..

Microsoft.Dynamics.AX.Framework.Reporting.Shared.ReportException
   at Microsoft.Dynamics.AX.Framework.Services.Client.ServiceClientHelper.InvokeChannelOperation[TResult,TChannel](IServiceClient`1 client, Func`2 operationInvoker, Func`2 exceptionWrapper)
   at Microsoft.Dynamics.AX.Framework.Reporting.Shared.SRSFrameworkServiceProxy.Microsoft.Dynamics.AX.Framework.Reporting.Shared.IXppSRSFrameworkService.getRelationLinkTargetList(SRSFrameworkServiceGetRelationLinkTargetListRequest request)
   at Microsoft.Dynamics.AX.Framework.Reporting.Shared.SRSFrameworkServiceClient.Microsoft.Dynamics.AX.Framework.Reporting.Shared.ISRSFrameworkService.GetRelationLinkTargetList(String tableFieldsListEncodedStr)
   at Microsoft.Dynamics.AX.Framework.Reporting.Shared.TableFieldMenuItemService.GetRelationLinkTargetList(String fieldList)
   at Microsoft.Dynamics.AX.Framework.Reporting.Shared.TableFieldMenuItemService.Resolve(String encodedString)
   at Microsoft.Dynamics.AX.Framework.Reporting.Shared.AutomaticDrillThroughStep.Transform(XDocument report, ILocalReportContext reportContext, ILocalUserContext userContext)
   at Microsoft.Dynamics.AX.Framework.Reporting.Shared.CustomizationExtensionImplementation.ProcessReportDefinition(Byte[] reportDefinition, ILocalReportContext reportContext, ILocalUserContext userContext, Byte[]& reportDefinitionProcessed)