Missing items on stock code selection window

The stock code selection window has several options at the bottom of the window that allow you to exclude certain types of inventory items such as items that are discontinued or are non-stock items.  As these settings are specific to each system, items that appear on one system but not another my simply be excluded from the selection list on the system which do not show the items.
To show all of the items in the selection window, uncheck all of the exclude options at the bottom of the window.