Order Import - Item Validation Resulted in error(s)

Hi,

While in updating the existing orders using order import, few orders are error out with error message like "Item Validation Resulted in error(s)." and when I submit these orders from Import Orders --> Corrections Form(after deleting request id and error flag), those orders got processed with out any issues. I surprised how those orders are getting processed in second time though I did not change any value in the order line. Please help me to overcome this issue.

Thanks for your great help!!!

Thanks

Siva