Disabling the cache.

[eluser]gtech[/eluser]
are you on a unix/linux type system? I came across this error the other day in the forum and remember doing a search (the answer is in these forums somewhere).

I seem to remeber its somthing to do with apache not having permissions to write to the filesystem

try and recursive chmod 0777 the root of your codeigniter install (where the index.php lives) and all subdirectories and see if that fixes the problem, or change the ownership so apache can access it.