MRDF-802 — A file cannot be read for later use
As an optimization, files that are used often by the proxy can be read into memory on proxy start. The files are later served from memory and need not be read from disk repeatedly. For example, error documents of the http-proxy are handled this way. Either individual files, or all files in a directory may be read. This message notifies that a file cannot be read on proxy start. It will be read on demand later.