MATLAB Cloud runs on Linux systems. On Linux systems, depending on exact context, \ in a file name might just be another character, or might "introduce" a two character special sequence. There does not happen to be a special sequence designated by \i so if \i happened to occur in a context that was expecting the possibility of special sequences, then the \i might lead to an error message because of the bad sequence, or the \i might be treated as just two characters, '\' and 'i'
On Linux systems, \ is never treated as a directory separator.
Moral of the story: use fullfile() to construct paths.
