`IMechanicalExtAPI` Last update: 09.03.2026 class Ansys.ACT.Interfaces.Mechanical.IMechanicalExtAPI Bases: object Exposes the main entry point of all ATC APIs. Overview Methods Name Description LockPrePostLicense Locks the license used by the PRE/POST application. UnlockPrePostLicense R Method detail IMechanicalExtAPI.LockPrePostLicense() → None Locks the license used by the PRE/POST application. IMechanicalExtAPI.UnlockPrePostLicense() → None R Unlocks the license used by the PRE/POST application. This is required if you want to manually launch the Ansys solver. You must relock the license after its use. If you don't relock the license, the PRE/POST application will be in read-only mode.