Are you trying to update the grossAmount propery of the LineItem class? Perhaps it’s as simple as:

rule "split line item"
when
    $item  : LineItem( grossAmount > 1000 )
then

    $item.setGrossAmount(500);

    // you may also wish to update the LineItem fact in working memory if you want to trigger additional rules based on this update
end

From: rules-users-bounces@lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Ashish Soni
Sent: April-01-09 9:40 AM
To: Rules Users List
Subject: [rules-users] Rule Compilation error : The Field ... is not visible

Hi All ,

I am sure there must be a silly mistake but i am not able to find out , please help me as what is wrong in below rule

package Test
import com.abc.api.document.Document
import com.abc.api.line.LineItem

rule "split line item"
when
    $item  : LineItem( grossAmount > 1000 )
then
    modify( $item ) { grossAmount=500 };

end


11:35:23,318 ERROR [] Rule Compilation error : [Rule name='split line item']
        Test/Rule_split_line_item_0.java (7:565) : The field LineItem.grossAmount is not visible



Thanks,
Ashish