If you want to load documents based on material numbers, activate the additional function searchDocumentByMaterial and set specific filters in the attribute mapping block [SEARCH_DOCUMENT_BY_MATERIAL].
Activate the key for material number and set the value for the corresponding table column.
Now when exporting a table line with existing material, all linked documents are listed in a dialog box.
Optionally: Set other filters such as Release Status, for example.
In the opened dialog, select the table row with the desired document number and click Continue export with selected DIS [Continue export with chosen DIS].