Basic concepts

Each of the INCONTROL products, and the common IOA infrastructure as well, has a compatibility mode set to them in the IOAPARM member of the IOA PARM library.

These modes are also managed from ICE, through the Customization panels.

The names of these compatibility mode parameters are in the form MODEnnn, where

nnn denotes the product line (CTM, CTD, IOA, and so on), and the values of these modes correspond to feature sets that were introduced in different versions of the products:

• MODEnnn=800 refers to the basic feature set available for version 8.0.xx
• MODEnnn=900 refers to the basic feature set available for version 9.0.xx
• MODEnnn=918 refers to the basic feature set available for version 9.0.18.xxx
• MODEnnn=919 refers to the basic feature set available for version 9.0.19.xxx

In general, products of a given version can work in their native full feature mode (the mode corresponding to that version according to the list above), but also in a mode that is a version lower than the native mode. This ability to work in a mode lower than the native mode is also called C-1 compatibility.