>First, thank you. Your approach should work and should be my solution. But I have changed the TEXT TO ENDTEXT to a string (because I will store it in the app object). So in my case I have
>

> cExpr = "<<tcAliasName>>.INSTOCK + <<tcAliasName>>.ONORDER - <<tcAliasName>>.REORDERPNT"
>nQty = EVALUATE( cExpr ) 
>

>
>But I get error Missing Operand. I must be doing something wrong. I will keep checking my syntax.
>
>UPDATE. The error is actually Missing Expression, not Operand.

  cExpr =textmerge( "<< m.tcAliasName >>.INSTOCK + << m.tcAliasName >>.ONORDER - << m.tcAliasName >>.REORDERPNT")
  nQty = EVALUATE( m.cExpr ) 

Or without merging (merging is nice BTW):

  cExpr = m.tcAliasName + ".INSTOCK + " +  m.tcAliasName + ".ONORDER - " + m.tcAliasName +".REORDERPNT"
  nQty = EVALUATE( m.cExpr ) 

(Without text merging it is a bit obscure using operands)