There could be a number of exemptions that apply. For example, there may be information about incompatibles. There may be information on the file that relates to third-party information. There may be information on security issues. There are a number of things in a correctional environment that require you to do some vetting before you just turn over the file.
So it's a balance between wanting to have as complete a file as you can, which captures all the information, and recognizing that in a correctional environment there are some things that can't just be turned over.