OJ by default tries to create any file it needs on-the-fly. Unfortunately, this is a tricky process sometimes, as different Web hosting companies allow the Web server software different permissions (complicated by different operating systems!).

So usually, yes, again, this is a permissions problem with the file in question, or the directory the file resides in. If the software is able to write to a subdirectory in that directory, then the permissions on the directory itself are probably set correctly. So try chmod'ing the index.html file to 777 and see if that works...

John