Always keep a copy of the exact base install DVD (SPB_16.60.000) and hotfix 004 together in an offline archive. Cadence no longer distributes 16.6 installers via its main download portal. If you lose the base media, you cannot reapply the hotfix.
Later hotfixes in the 16.6 cycle (starting around S051) introduced significant changes, such as: Menu Changes Cadence SPB OrCAD 16.60.004 Hotfix
, which provides a one-click interface for modifying, repairing, or uninstalling releases. Troubleshooting Common Issues License Errors : If applications run in "demo mode," verify that the CDS_LIC_FILE What is Cadence SPB OrCAD 16