Question on aggr/if in alternate state

[gerrycastellino]

=if(not(isnull(only({[s_Hier_Comp2]} fieldA))),

aggr(only({<ASSET_CLASS=P({s_Hier_Comp1}) * P({s_Hier_Comp2})>} ASSET_CLASS), ASSET_CLASS),

aggr(only({<ASSET_CLASS=P({s_Hier_Comp3}) * P({s_Hier_Comp4})>} ASSET_CLASS), ASSET_CLASS)

)

I have the above statement in an expression for a list box.

I need to apply a union of 2 alternate(s)  based on my if condition (if there is a value for fieldA.

There seems to be some syntax issues in this, need to re-structure my aggr/if

Gerry

[gerrycastellino]

only one selection possible.