Prerequisites to upgrade (upgrade only)

You should be running Oracle Empirica Signal release 9.1 or later before upgrading to release 2025.4.01.

You can upgrade from releases 9.1.0.x, 9.2.0.x, 9.2.1.x, 9.2.2.x., 9.2.3 to release 2025.4.01.

If upgrading from versions before 9.0, please use the 9.0 upgrade guide as first step.