Executing a procedure in Forms Customization Problem

I am trying to do a form customation in the Shipping Transaction form.  I set up a menu item on the tools menu and now I want it to execute a procedure.  In the actions I set the builtin Type to Execute a Procedure and for the Argument entered:  ='

begin

apps.cviirtsubinvtrxn.irtupdatedelweight(""||${item.dlvy.delivery_id.value}||"");

end;'

I am getting an error and don't know what is incorrect here.  I know the procedure works because I tested it in toad.  Here is the error I am getting.

ORA-00923: FROM keywork not found where expected.

Can someone tell me what might be wrong?  Thank you