If an application is using sequenced error messages, ct_diag acts on message chunks instead of messages. This has the following effects:
A ct_diag(CS_GET, index) call returns the message chunk that has number index.
A ct_diag(CS_MSGLIMIT) call limits the number of chunks, not the number of messages, that Client-Library will store.
A ct_diag(CS_STATUS) call returns the number of currently stored chunks, not the number of currently stored messages.
