| GENERAL DESCRIPTION |
At the beginning of a site's conversion to CoreFLS software, the Legacy
Software Shut Down (LSSD) program is run to convert the IFCAP, AEMS/MERS, and
Equipment/Turn-In Request packages to a read-only state. These packages will
be referred to as legacy packages. One of the steps in the program is
disabling any options in the legacy systems which could effect an addition,
modification, or deletion of data to the site's VistA database. All legacy
options are disabled except those in a pre-determined list, which is known as
the 'Options to Leave ALone' list. The list is in the LSSD (#449.1) file and
will be referred to here as the List.
Before a site converts to CoreFLS, the site will continue to install patches
as necessary to fix bugs or add functionality to the legacy packages. When
adding functionality, a patch may add or enhance or delete an option or group
of options. Later on, when the site runs the LSSD shutdown and converts to
CoreFLS, the site may need to continue using the functionality provided by
those new options. In that case, it will become necessary to prevent those
options from being disabled by the shutdown. To do this, the options must
have been added to the List before the shutdown was run. Likewise, there may
be options in the List that a future patch may remove or enhance such that
those options should be disabled by the legacy shutdown. Those options should
then be removed from the List before the legacy shutdown is run. This IA
describes the API that patch developers should use to add or remove options
from the List. The API must be invoked in the post-install executable of a
patch.
In any patch that uses this API, the patch must also include a patch
dependency for the LSSD patch, PRC*5.1*65.
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