How to use straight table expression in aggr expression ?

[seWork]

Hi all,

I have a straight table that contains a Group dimension and the following expression

pick(match('A','B','C','D'),

sum(aggr(sum(XYZ),Item,Group))*vA ,

sum(aggr(sum(XYZ),Item,Group))*vB ,

sum(aggr(sum(XYZ),Item,Group))*vC,

sum(aggr(sum(XYZ),Item,Group))*vD) 

This expression returns the expect result

I'm trying to have another expression that will look like

sum(aggr(Vol*

pick(match('A','B','C','D'),

sum(aggr(sum(XYZ),Item,Group))*vA ,

sum(aggr(sum(XYZ),Item,Group))*vB ,

sum(aggr(sum(XYZ),Item,Group))*vC,

sum(aggr(sum(XYZ),Item,Group))*vD) 

 ,Item,Group))

But this expression returning 0 for all records

any suggestions?