[Dillo-dev] can't start dpid daemon

When I click on the "Book" icon in Dillo 1.3.0, select "view page source" from the menu or try to load a page from disk I get the message: "ERROR: can't start dpid daemon (URL scheme='dpi') or 'file' I looked at the code and this message is generated at line 716 in capi.c. However, it looks like the dpid daemon is started at a different place in the code way before it gets to that line. Where in the code does Dillo try to start this daemon? I would like to put some trace messages in there to locate the problem. Georg