which makes older files incompatible with later ones. This can sometimes be
remedied by patching the older files if the location and nature of the patch
can be worked out.
The documentation for a program should note in detail any patching that
has been carried out, giving the date and the nature of the patch, along with
the reason for patching. The date is important because if the patch has
affected files, then the date shows from what point files will have been
affected - most operating systems date their files at the time of saving them.
It is important to remember, however, that patching is a drastic measure. It
require ...
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