In SQL Image Viewer 10.3, we added support for Navision compressed files stored in the Incoming Document Attachment table.
When you run a query on the Incoming Document Attachment table, the Content field will display the following if it contains compressed data.
To extract the contents, click on the Export images and files button.
This opens the Export images and files dialog.
Walk through the steps, and SQL Image Viewer will extract and export the files stored in the Content field for you.