I'm running brive on Windows. I've noticed that if a google doc has a forward slash in the name that Brive will choke on the file with an error like No such file or directory. I'm assuming it's interpreting the / as a folder. So it take the first half of the file as a 'folder name' and the last half (after the /) as the file name. I might suggest you ignore them or replace them with other characters.