If you are looking to restore your licensed copy of AutoCAD 2002, follow these steps to resolve the .dll error:

If you are receiving an error that cdilla.dll is missing or failing to load, the standard procedure is to update the License Manager:

AutoCAD 2002 has unpatched security vulnerabilities. Running it on a networked machine exposes your system. Additionally, it cannot leverage modern graphics drivers or multi-core CPUs.