HFM rule not working. No Syntax error but consolidation aborting

I want to put if condition check data in two accounts. I get no syntax error but consolidation aborting after puting the below code.

If HS.Value.Member = "<Entity Currency>" or HS.Value.Member = "<Entity Curr Adjs>"  Then

    If  "A#600.cust2#[None] <> 0" Then

    if "A#Inv_Purch_Ext.Chan#[None] = 0" Then

    HS.EXP "A#700.cust3#[None] =  A#600.cust2#[None]"

    ELSE

    HS.EXP "A#700.cust3#[None].cust2#[None] = 0"

    END IF

    END IF

END IF

I am  new to HFM rules. Please suggest and recommend the way to achive this.