Drilling data item on a condition

[Vishwas]

Hi,
I have a crosstab where my first column should be either ORGANIZATION or LOCATION based on ?Par_OrgLoc? parameter, both ORGANIZATION and LOCATION will drill down.
I have created following dataitem [Org-Loc] expression to put there
case ?Par_OrgLoc?
when 'Org' then
[Headcount Detail].[Organization Dimension].[Organization].[Organization Level 1]
when 'Loc' then
[Headcount Detail].[Location Dimension].[Location].[Country]
end
But I do have some calculation which have definitions like following
aggregate(currentMeasure within detail [Org-Loc])
aggregate(currentMeasure within Set [Org-Loc])
But this is giving me following error.

QE-DEF-0478
Invalid coercion from 'string' to 'hierarchy, level' for 'aggregate( currentMeasure within set members([Organization Level0@Organization Level$]) )'.

RSV-SRV-0042 Trace back: RSReportService.cpp(747): QFException: CCL_CAUGHT: RSReportService::process() RSReportServiceMethod.cpp(217): QFException: CCL_RETHROW: RSReportServiceMethod::process(): asynchWait_Request RSASyncExecutionThread.cpp(690): QFException: RSASyncExecutionThread::checkException RSASyncExecutionThread.cpp(204): QFException: CCL_CAUGHT: RSASyncExecutionThread::run(): promptPagingForward_Request RSASyncExecutionThread.cpp(740): QFException: CCL_RETHROW: RSASyncExecutionThread::processCommand(): promptPagingForward_Request Execution/RSRenderExecution.cpp(614): QFException: CCL_RETHROW: RSRenderExecution::execute Assembly/RSDocAssemblyDispatch.cpp(251): QFException: CCL_RETHROW: RSDocAssemblyDispatch::dispatchAssembly Assembly/RSLayoutAssembly.cpp(63): QFException: CCL_RETHROW: RSLayoutAssembly::assemble Assembly/RSDocAssemblyDispatch.cpp(317): QFException: CCL_RETHROW: RSDocAssemblyDispatch::dispatchChildrenAssemblyForw ard Assembly/RSReportPagesAssembly.cpp(163): QFException: CCL_RETHROW: RSReportPagesAssembly::assemble Assembly/RSDocAssemblyDispatch.cpp(268): QFException: CCL_RETHROW: RSDocAssemblyDispatch::dispatchAssembly Assembly/RSPageAssembly.cpp(284): QFException: CCL_RETHROW: RSPageAssembly::assemble Assembly/RSDocAssemblyDispatch.cpp(268): QFException: CCL_RETHROW: RSDocAssemblyDispatch::dispatchAssembly Assembly/RSTableRowAssembly.cpp(154): QFException: CCL_RETHROW: RSTableRowAssembly::assemble Assembly/RSDocAssemblyDispatch.cpp(268): QFException: CCL_RETHROW: RSDocAssemblyDispatch::dispatchAssembly Assembly/RSTableCellAssembly.cpp(108): QFException: CCL_RETHROW: RSTableCellAssembly::assemble Assembly/RSDocAssemblyDispatch.cpp(317): QFException: CCL_RETHROW: RSDocAssemblyDispatch::dispatchChildrenAssemblyForw ard Assembly/RSTableAssembly.cpp(89): QFException: CCL_RETHROW: RSTableAssembly::assemble Assembly/RSDocAssemblyDispatch.cpp(317): QFException: CCL_RETHROW: RSDocAssemblyDispatch::dispatchChildrenAssemblyForw ard Assembly/RSTableRowAssembly.cpp(154): QFException: CCL_RETHROW: RSTableRowAssembly::assemble Assembly/RSDocAssemblyDispatch.cpp(268): QFException: CCL_RETHROW: RSDocAssemblyDispatch::dispatchAssembly Assembly/RSTableCellAssembly.cpp(108): QFException: CCL_RETHROW: RSTableCellAssembly::assemble Assembly/RSDocAssemblyDispatch.cpp(317): QFException: CCL_RETHROW: RSDocAssemblyDispatch::dispatchChildrenAssemblyForw ard Assembly/RSDocAssemblyDispatch.cpp(268): QFException: CCL_RETHROW: RSDocAssemblyDispatch::dispatchAssembly Assembly/RSDocAssemblyDispatch.cpp(268): QFException: CCL_RETHROW: RSDocAssemblyDispatch::dispatchAssembly Assembly/RSDocAssemblyDispatch.cpp(317): QFException: CCL_RETHROW: RSDocAssemblyDispatch::dispatchChildrenAssemblyForw ard Assembly/RSDocAssemblyDispatch.cpp(317): QFException: CCL_RETHROW: RSDocAssemblyDispatch::dispatchChildrenAssemblyForw ard Assembly/RSDocAssemblyDispatch.cpp(317): QFException: CCL_RETHROW: RSDocAssemblyDispatch::dispatchChildrenAssemblyForw ard Assembly/RSDocAssemblyDispatch.cpp(317): QFException: CCL_RETHROW: RSDocAssemblyDispatch::dispatchChildrenAssemblyForw ard RSQueryMgr.cpp(1019): QFException: CCL_RETHROW: RSQueryMgr::getResultSetIterator RSQueryMgr.cpp(1165): QFException: CCL_RETHROW: RSQueryMgr::createIterator RSQueryMgr.cpp(1476): QFException: CCL_RETHROW: RSQueryMgr::executeRsapiCommand RSQueryMgr.cpp(1463): QFException: CCL_RETHROW: RSQueryMgr::executeRsapiCommand RSQueryMgrExecutionHandlerImpl.cpp(172): QFException: CCL_RETHROW: RSQueryMgrExecutionHandlerImpl::execute() RSQueryMgrExecutionHandlerImpl.cpp(164): QFException: CCL_RETHROW: RSQueryMgrExecutionHandlerImpl::execute() RSQFSession.cpp(250): QFException: CCL_RETHROW: RSQFSession::DoRequest QFSSession.cpp(608): QFException: CCL_RETHROW: QFSSession::ProcessDoRequest() QFSSession.cpp(606): QFException: CCL_CAUGHT: QFSSession::ProcessDoRequest() QFSSession.cpp(555): QFException: CCL_RETHROW: QFSSession::ProcessDoRequest() QFSConnection.cpp(738): QFException: CCL_RETHROW: QFSConnection::Execute QFSQuery.cpp(176): QFException: CCL_RETHROW: QFSQuery::Execute v2 Coordin