Hi @mdeanton ,

You may want to look over this thread on the forum.  

You can also review Client Information and Coding Mechanisms in IFS Technical documentation. Hope that will help.

Regards,

William Klotz

Thanks -- I am using a ‘before’ trigger on the event as suggested in the other thread, but displaying the message is still inconsistent. 

It works for some users, but not for others even if they have the same roles...

That sounds strange. Is is possible to re-create it for those users? Which Entity/LU is this for? 
Can you post the event code here?

this is the code to invoke the message box

                Client_SYS.Add_Info ('PurchaseOrderLine',
                                     'PurchaseOrderLine: This is the first time Supplier :P1 :P2 is being used to order the part :P3',
                                     lv_supplier_no,
                                     lv_supplier_name,
                                     lv_part_no);