I found the problem with this alternative DjVu viewer on PB 602.
If I have the file without the table of contents, then I unable to use bookmarks and citations. I can put a bookmark or store a citation, but there is no way to display the list of bookmarks. When I'm trying to display the TOC, I get the message that TOC is absent. It is not only the problem of this DjVu viewer, but also of pdfViewer.