hey guys, im currently playing around with the FileAcess stuff , I am able to check weather a save file exists and use store_var and get_var to save and load, however when I altar the script and add new variables to save and load it causes an error on load cause those variables dont exist. im trying to find a way to check if the variable im trying to fetch with get_var() currently has data to retreive is this possible does anyone know?

If you want to support different versions of a binary file format (e.g. with some values missing from older versions) you will have to do the version management yourself. You can for example store at the very beginning of the file a version number via store_32. When reading the file you read this number first (get_32) and then you only read the variables that belong to this particular version.