I worked on my .osm file, gathered results.. everything was fine, and then when I reopened the .osm file (without changing anything) I had this message that popped up So I reloaded the weather file, and checked all the tabs to see if something else has changed, and realised that all the measures were not there anymore, so I reloaded the measures and ran it ... but it failed , I could though fix the error but I don't know why is this happening and affecting the work (by generating errors)
Does anyone know anything about that? and mostly how to avoid this kind of crashing ?