Export/Import Tool extension throwing an error on importing

Hi, at the time of import products it shows this error:

Uploaded spreadsheet file has validation errors! See also 'System > Tools > Error Logs' for more details.
No server data has been changed.

2016-11-14 4:54:56 - Export/Import: Missing product_ids in worksheet 'Products'!

product_ids are there already.

Opencart version 2.1.0.3

thanks,
Salman

This is probably an issue with invisible trailing blank lines in your worksheet, caused by MS Excel. Please use OpenOffice or LibreOffice and resave.