cognos异常 BMT-MD-6003异常

cognos错误求助 BMT-MD-6003错误
我点击报表的时候提示BMT-MD-6003 无法连接至数据源
详细错误信息如下：
RSV-SRV-0042 回溯： RSReportService.cpp(595): QFException: CCL_CAUGHT: RSReportService::process() RSReportServiceMethod.cpp(177): QFException: CCL_RETHROW: RSReportServiceMethod::process(): asynchRunSpecification_Request RSASyncExecutionThread.cpp(562): QFException: RSASyncExecutionThread::checkException RSASyncExecutionThread.cpp(179): QFException: CCL_CAUGHT: RSASyncExecutionThread::run(): asynchRunSpecification_Request RSASyncExecutionThread.cpp(612): QFException: CCL_RETHROW: RSASyncExecutionThread::processCommand(): asynchRunSpecification_Request RSMetadataService/RSMetadataMgr.cpp(165): QFException: CCL_RETHROW: RSMetadataMgr::executeRequest() RSQueryMgr.cpp(1455): QFException: CCL_RETHROW: RSQueryMgr::executeRsapiCommand RSQueryMgr.cpp(1442): QFException: CCL_RETHROW: RSQueryMgr::executeRsapiCommand RSQFSession.cpp(166): QFException: CCL_RETHROW: RSQFSession::DoRequest QFSSession.cpp(1479): QFException: CCL_RETHROW: QFSSession::ProcessDoRequest() QFSSession.cpp(1477): QFException: CCL_CAUGHT: QFSSession::ProcessDoRequest() QFSSession.cpp(1444): QFException: CCL_RETHROW: QFSSession::ProcessDoRequest() QFSConnection.cpp(771): QFException: CCL_RETHROW: QFSConnection::Execute QFSQuery.cpp(82): QFException: CCL_RETHROW: QFSQuery::Execute BmtRtmBuilderImp.cpp(633): QFException: CCL_RETHROW: BmtRtmBuilderImp::CreateConversionScript BmtActionsHelper.cpp(466): QFException: CCL_RETHROW: BmtActionsHelper::DoAction BmtActionsHelper.cpp(466): QFException: CCL_RETHROW: BmtActionsHelper::DoAction FMMetadataRetrieverMgr.cpp(824): QFException: CCL_THROW: QE_Substitute 
但是我关闭之后再点这个报表就可以打开！！但是我再点击又不好用了！！这个错误是间隔性的出来！点击如果正常打开报表，那么下次点击就提示错误，然后再点击又可以打开报表了，然后再点又这个错误！！

------解决方案--------------------
是不是两个服务器啊？一个做备用服务器。两个服务器cognos都启动的原因！