Can you break that down? Whats an 'Arv studio thing'? I'm not sure what file you are trying to load into what eg
1. Are you loading a C file into AVRStudio but it gives an error - in which case it may have some strange character encoding
2. Are you trying to load a HEX file via AVRStudio to the microcontroller?
3. May be something else?
Please give steps of what you are doing, when you get an error and 'exactly' what it is.