Add a new message if the source of the error is NaN
Add a new message if the source of the error is NaN

clementval/serialbox,MeteoSwiss-APN/serialbox,C2SM-RCM/serialbox,C2SM-RCM/serialbox,clementval/serialbox,C2SM-RCM/serialbox,clementval/serialbox,MeteoSwiss-APN/serialbox,C2SM-RCM/serialbox,MeteoSwiss-APN/serialbox,clementval/serialbox,MeteoSwiss-APN/serialbox