No, you're not missing anything.
Adobe have decided (why? no idea) that commas are not "safe characters" and so can't be included in the file path when using saveAs().
Idiotic? Yes, but there's nothing you can do about it except complain here: https://www.adobe.com/cfusion/mmform/index.cfm?name=wishform
Thanks for that link to the "wish forum".
I have reported failure to accept commas in the path as a bug.
I'll keep this question open for just a little longer.
Does anybody know of any tricky escape character sequences that might solve the problem? I have failed with "\," and various ideas for nested quotes.
You can also drop an Email to me at email@example.com to let me know further in this. Thanks.
Wow... It took 8 years (at least...) to fix this bug? Better late than never, I guess. Thanks for the update!
If one is dealing with cross platform (Operating Systems) of data then it might not be the best idea since different OSs have different restraints on drive names, directory names, file names, etc.
One might not always know the configuration of other users systems and networks. It is possible a user could be on Windows and the network servers are Unix.