Hi Rajendhar,
Please check if the vendor has open items posted. If vendor have the items posted and not appearing in FBL1N.
1 Select the All items under Line Item selection and give the todays date
2. Select Normal items, spec Gl transactions, noted items ;under Type and execute.
3. If still system not showing any documents. In Menu field check the layout which is currently using and try to change the other standard layout and try pull the line items
4. If still not seen the documents list then it would be a technical issue contact a ABAP consultant.
Regards,
Inthiyaz