Message - Lo-position does not exist in current datafile
I'm running Locus pro and using BRouter and "navigation". This has been re-calculating ok whenever I go off-route but on the last couple of cycles it has not. When I go off-route I get a message something like "Lo-position does not exist in current datafile" and my route is not re-calculated. I use an external app to plan routes and import them into Locus and, while I've tweaked the odd navigation setting, I'm not aware of significantly changing anything - apart from changing audio instructions from the default voice to Albert morse.
Can anyone please explain why this message is generated and how I might be able to fix it? Many thanks,