SSIS Variables with xml

I want to use an xml path and assign the results to variables within an ssis package.

I keep getting errors that it will not assign the variable.

I am converting a flat table wihch has email addresses in one column to a more normalized structure (header/detail) so in my ssis routine i need to keep in place for every one customer email a list of recipients. the table works fine - but not normalized and I need to clean this up.

SELECT HDR.CUST_NUM ,HDR.CUST_NAME

,HDR.CNTC

,STUFF((SELECT ';'+ dtl.EM_ADDRESS 
    FROM DEV_USR.dbo.T_OS_WEEKLY_RPT_DIST AS dtl
    WHERE dtl.EM_TYP = 'TO'
    AND dtl.CUST_NUM = HDR.CUST_NUM
    FOR XML PATH('')),1,1,'') as [TO]
,STUFF((SELECT ';'+ dtl.EM_ADDRESS 
    FROM DEV_USR.dbo.T_OS_WEEKLY_RPT_DIST AS dtl
    WHERE dtl.EM_TYP = 'CC'
    AND dtl.CUST_NUM = HDR.CUST_NUM
    FOR XML PATH('')),1,1,'') as [CC]
,STUFF((SELECT ';'+ dtl.EM_ADDRESS 
    FROM DEV_USR.dbo.T_OS_WEEKLY_RPT_DIST AS dtl
    WHERE dtl.EM_TYP = 'BCC'
    AND dtl.CUST_NUM = HDR.CUST_NUM
    FOR XML PATH('')),1,1,'') as [BCC]
FROM DEV_USR.dbo.T_OS_WEEKLY_DIST_HDR hdr
GROUP BY HDR.CUST_NUM
    ,HDR.CUST_NAME
    ,HDR.CNTC