Hello,
I received following error while setting the longtext at item level.
I did exactly same as mentioned in the post.
http://wiki.sdn.sap.com/wiki/display/ABAP/PurchaseReq.LineitemDatamanipulationusingBADI-+ME_PROCESS_REQ_CUST
System error (text name empty in text object EBAN
and text ID B02).
Appreciate your help,
-Kalpesh