Regarding xml file sequence and sales order sequence not equal

Hi frnds,

                                 The XML File generates after sorting the line items, the sorting is done alphabetically on material master codes but the when the program converts the XML to Sales orders, the line item numbers does not matches with the line item of the XML File, like to understand how the XML conversion happens and is it possible to keep the same sequence of the XML file?

Regards,

Jaya.