Hi, 

Hate to say … but it depends on what can be reasonably done.  

For example, using object connection transformation, we can set up a transformation such that a document / image assigned to a purchase requisition line can flow to a purchase order line. The data can be connected, and the flow supports that transformation. 

I have not tested a customer invoice where that attached image flows to the posting line.  

If the image was attached to a customer invoice posting line (your example is probably not connected) then I would expect the ability to use the object transformation to copy the link to the voucher rows, and then to GL voucher rows.  

In your example, it appears that the image would be attached to the invoice header, it’s possible that the object transformation process would not be able to then include the image on a posting line.   See the following screen. 

To test, go to customer invoice postings, and see if you document is available on the posting lines.  It may be available at the header, but this needs to be on the posting lines. If the image is available, then a transformation can probably copy tis to the voucher rows. 

Best regards, 

Thomas