@Tev @dustin.perkins See if this helps: (I tried for 2 whole days to make the standard RDD work with this report and nothing would work since its a temporary dataset so no matter how I joined with tables and relationships it would never work.)
Modify your MtlTag Dataset in the SSRS report based on the last field in the query below with the (select statement) and try it. I recently modified my MtlTag while working on an autoprint method to include the Material Queue Sequence id in relation to the NonConformance Tran ID. And the method below worked since where dealing with a temporary table being generated for the MtlTag dataset.
Blockquote
SELECT
T1.[AsmSeq]
,T1.[TagNum]
,T1.[BCAsmSeq]
,T1.[BCBinNum]
,T1.[BCJobNum]
,T1.[BCLotNum]
,T1.[BCOprSeq]
,T1.[BCPartNum]
,T1.[BCWhseCode]
,T1.[BinNum]
,T1.[ItemQty]
,T1.[JobNum]
,T1.[LaborNote]
,T1.[LotNum]
,T1.[NCComment]
,T1.[NonConfTranID]
,T1.[OpCode]
,T1.[OprSeq]
,T1.[PartNum]
,T1.[PartDesc]
,T1.[POLine]
,T1.[PONum]
,T1.[PORel]
,T1.[Reason]
,T1.[ReasonDesc]
,T1.[ResGrpID]
,T1.[TagFormat]
,T1.[TagTitle]
,T1.[UM]
,T1.[VendID]
,T1.[VendName]
,T1.[WhseCode]
,T1.[QtyNum]
,T1.[LegalNumber]
,T1.[JobSeqType]
,T1.[Revision]
,T1.[Company]
,T1.[MtlSeq]
,T1.[PurPoint]
,T1.[RefAsmSeq]
,T1.[RptUserID]
,T1.[UM_UOMSymbol]
,T1.[VendorNum]
, (SELECT ISNULL(DMRNUM,0000) FROM [EPICORTEST].[ERP].[DMRHEAD] (NOLOCK)
WHERE PONUM = CONVERT(INT,T1.PONUM)) as ‘’ FROM MtlTags_" + Parameters ! TableGuid.Value +
" T1 "