Folder names in SVN cannot contain dots and commas

We faced a strange issue today while trying to commit a folder in SVN. The folder was of the form ABC,DEF.GHI.JKL The command kept throwing an error Commit Failed. The most annoying part was - the reason why it failed was not conveyed to the end user at all!

Lesson for all us software developers: Always degrade gracefully and give proper reasons for it so that users can take corrective actions efficiently.