Inter-Release Compatibility - AT&T MERLIN LEGEND Release 3.0 System Programming And Maintenance Manual

Upgrading the System
NOTE:
If SPM is already installed, the Welcome to SPM screen that appears when you
start SPM identifies the version on both the last line of the console simulation
window and in the upper left corner of the screen. If you are working with
Version 3. XX, V3 appears in the upper left-hand corner of the screen and
Version 3.XX appears on the last line of the console simulation window.

Inter-Release Compatibility

It is important to understand compatibility between files created on each of
the different versions of SPM, not only for upgrading but also for
programming.
Table 6 summarizes programming compatibility. (It is assumed that the
majority of the programming is done in surrogate mode and backed up on
disk).
64 System Programming and Maintenance (SPM)