Pln.lck File ((new)) Jun 2026

Typical paths include:

The pln.lck file is a hidden lock file associated with . It is automatically generated by the software when a user opens a project stored in the legacy Primavera P6 Professional database (PMDB) or when working with local .pln project files in earlier versions (e.g., P6 v6–v8). pln.lck file

A PLN.LCK file is a type of lock file used by software applications to prevent multiple instances of a program from running simultaneously. The .pln extension typically represents a planning or project file, while .lck stands for "lock." This file serves as a flag, indicating that a specific file or resource is currently being used by another process or application. Typical paths include: The pln

: As long as this file exists, other users will receive a "File in Use" warning if they try to open the project. : Under normal conditions, ArchiCAD deletes the ArchiCAD deletes the