Which (e.g., Smart 3D, P&ID) are you trying to license? Are you on Windows 10 or 11 ?
Unofficial "keygen fixes" found in community guides often focus on resolving specific technical barriers to license generation:
Before diving into "fixes," it is helpful to know how the SPLM 12 system actually validates your software.
SmartPlant License Manager (SPLM) is a client-server system used to track concurrent user access for plant design software. Version 12 (also referred to as SPLM 2012) introduced specific machine identification requirements. Machine ID Generation : Users must generate a unique "Machine ID" using the GenMachineGUI.exe splm 12 keygen fix
You must first run the splmGenMachineID_2012.exe utility on your license server to create a unique identifier for your hardware.

