Getting table region values on Save

Hi ,
I am extending the Work Order Creation and update page from Maintenance Super User screen,
I am doing like below to get all lines in controller.
+
OAApplicationModule am = (OAApplicationModule)pageContext.getApplicationModule(webBean);
OAViewObject vo = (OAViewObject)am.findViewObject("MaterialRequirementsVO");
if (vo.getFetchedRowCount() > 0)
System.out.println(String.valueOf("Fetched row count ").concat(String.valueOf(vo.getFetchedRowCount())));
while (vo.hasNext())
pageContext.writeDiagnostics(this,"Inventory ID "+vo.getCurrentRow().getAttribute("InventoryItemId"),3);
vo.next();
+
but I get data only when rows are not updated(without any changes it just click on save), and if any of the column in the table region is updated then i get null VO error.. and wont get any details of column.
OAF LOG: Event : Check Errors, in: oracle.apps.fnd.framework.webui.OAPageErrorHandler: Exception: Message not found. Application: EAM, Message Name: CANNOT_SAVE_WO. ,In VO: null
Please help.
Thanks,
--Amit

Hi ,
I have answered it in another thread , see if that helps you .
--Keerthi

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