SAP workflow - working with container Multiline item

Hi all

In my workflow for sale(SD module) i want to read all items of a sale document with special condition(for example blocked items) and

send the list of items(Item no and material ) to event creator ....

I created a new object (subtype for BUS2032) and i added new attribute(with multiline checkbox ) for this reason .every thing is ok and I have a list of block items when i test the object but when i use the object in my workflow i don't know how can i read and send one email to some one.

thanks ,

rostami reza , saphiran