It seems you are referring to Cadence OrCAD version 16.3 (often denoted as 16.3 or 163 in some shorthand notations) and possibly a patch, hotfix, or build number like 33.
The 33rd hotfix for OrCAD 16.3 was significant. It addressed: cadence orcad 163 33
If you are currently running this version, here are common issues and solutions: It seems you are referring to Cadence OrCAD version 16
Many legacy projects and archived designs were created in OrCAD 16.3. Designers often search for this version to: SCR 101234 – Crash when editing net names
OrCAD 16.3 focused heavily on improving design efficiency and signal integrity. If you are using or maintaining this version, here are its standout features:
Hotfix 33 was critical for fixing "database lock" errors that plagued earlier 16.3 builds. It introduced better recovery tools for corrupted .DSN (schematic) and .BRD (board) files.