I have to find the table where the field ARCHIVE_DOC_ID ( Id to store the image) is stored. I have to use functional module ARCHIVOBJECTS_DISPLAY_MIX1 to display the image.
In our case if we run tcode FBL1N then we get the list of document number. Further navigating from any document number we get next screen where we can display the image which is scanned document of the invoices.
The program which contains this function module to display the image is SAPLOPTA . so can you plese tell from where is s getting the archive_doc_id.