If both sets of fields that are being joined are text fields, why is there a data type mismatch error?
SELECT qry932_SFADetailAddMRCNRC.DirFirstName, qry932_SFADetailAddMRCNRC.DirLastName, qry932_SFADetailAddMRCNRC.EmployeeNo, qry932_SFADetailAddMRCNRC.MgrFirstName, qry932_SFADetailAddMRCNRC.MgrLastName, qry932_SFADetailAddMRCNRC.MgrEmpNo, qry932_SFADetailAddMRCNRC.[Close Date], qry932_SFADetailAddMRCNRC.RevMoYr, qry932_SFADetailAddMRCNRC.[Expected Turn-Up Date], qry932_SFADetailAddMRCNRC.[RevTurn-UpDate], qry932_SFADetailAddMRCNRC.[Product Name], qry932_SFADetailAddMRCNRC.[SumOfIncremental MRC (converted)], qry932_SFADetailAddMRCNRC.[SumOfNet NRC], qry932_SFADetailAddMRCNRC.MRC_NRC
FROM qry932_SFADetailAddMRCNRC
LEFT JOIN tblSFAProductLookupwProdRevType ON (qry932_SFADetailAddMRCNRC.MRC_NRC = tblSFAProductLookupwProdRevType.MRC_NRC_ADJ) AND (qry932_SFADetailAddMRCNRC.[Product Name] = tblSFAProductLookupwProdRevType.ProductName)
GROUP BY qry932_SFADetailAddMRCNRC.DirFirstName, qry932_SFADetailAddMRCNRC.DirLastName, qry932_SFADetailAddMRCNRC.EmployeeNo, qry932_SFADetailAddMRCNRC.MgrFirstName, qry932_SFADetailAddMRCNRC.MgrLastName, qry932_SFADetailAddMRCNRC.MgrEmpNo, qry932_SFADetailAddMRCNRC.[Close Date], qry932_SFADetailAddMRCNRC.RevMoYr, qry932_SFADetailAddMRCNRC.[Expected Turn-Up Date], qry932_SFADetailAddMRCNRC.[RevTurn-UpDate], qry932_SFADetailAddMRCNRC.[Product Name], qry932_SFADetailAddMRCNRC.[SumOfIncremental MRC (converted)], qry932_SFADetailAddMRCNRC.[SumOfNet NRC], qry932_SFADetailAddMRCNRC.MRC_NRC;
SELECT qry932_SFADetailAddMRCNRC.DirFirstName, qry932_SFADetailAddMRCNRC.DirLastName, qry932_SFADetailAddMRCNRC.EmployeeNo, qry932_SFADetailAddMRCNRC.MgrFirstName, qry932_SFADetailAddMRCNRC.MgrLastName, qry932_SFADetailAddMRCNRC.MgrEmpNo, qry932_SFADetailAddMRCNRC.[Close Date], qry932_SFADetailAddMRCNRC.RevMoYr, qry932_SFADetailAddMRCNRC.[Expected Turn-Up Date], qry932_SFADetailAddMRCNRC.[RevTurn-UpDate], qry932_SFADetailAddMRCNRC.[Product Name], qry932_SFADetailAddMRCNRC.[SumOfIncremental MRC (converted)], qry932_SFADetailAddMRCNRC.[SumOfNet NRC], qry932_SFADetailAddMRCNRC.MRC_NRC
FROM qry932_SFADetailAddMRCNRC
LEFT JOIN tblSFAProductLookupwProdRevType ON (qry932_SFADetailAddMRCNRC.MRC_NRC = tblSFAProductLookupwProdRevType.MRC_NRC_ADJ) AND (qry932_SFADetailAddMRCNRC.[Product Name] = tblSFAProductLookupwProdRevType.ProductName)
GROUP BY qry932_SFADetailAddMRCNRC.DirFirstName, qry932_SFADetailAddMRCNRC.DirLastName, qry932_SFADetailAddMRCNRC.EmployeeNo, qry932_SFADetailAddMRCNRC.MgrFirstName, qry932_SFADetailAddMRCNRC.MgrLastName, qry932_SFADetailAddMRCNRC.MgrEmpNo, qry932_SFADetailAddMRCNRC.[Close Date], qry932_SFADetailAddMRCNRC.RevMoYr, qry932_SFADetailAddMRCNRC.[Expected Turn-Up Date], qry932_SFADetailAddMRCNRC.[RevTurn-UpDate], qry932_SFADetailAddMRCNRC.[Product Name], qry932_SFADetailAddMRCNRC.[SumOfIncremental MRC (converted)], qry932_SFADetailAddMRCNRC.[SumOfNet NRC], qry932_SFADetailAddMRCNRC.MRC_NRC;