Diffusion Module (DICTRA) Licenses
You can start (and install) the Thermo‑Calc software without a valid license but you cannot do any calculations. To show information about the available and installed licenses, from the main menu select Help → Show License Info.
Network License Restrictions
The Diffusion Module (DICTRA) requires a separate license. If you are using a network client installation of Thermo‑Calc, then you may not be able to use the Diffusion Module (DICTRA) even if you have access to a license server with a valid network license file. This is because other clients who are part of your network installation may have checked out all instances of the network license allowed to run simultaneously.
Graphical Mode and Entering Demo Mode
In Graphical Mode only, and for users with a network license, you must exit Thermo‑Calc to release the license for use. The license is checked out as soon as you add a Diffusion Calculator and remains unavailable to others until you exit the program.
With a network license, and if as per above you temporarily do not have access to a license, you are automatically put into Demo Mode. Then the Diffusion Calculator is available with three elements. See Diffusion Module Available Graphical Mode Features for more information.
Console Mode
In Console Mode, a license is checked out when you enter the DICTRA module and it is checked back in when you leave the module. You do not need to exit the program.
If you are working in Console Mode and try to enter DIC_PARROT after having been in the PARROT module earlier in the session, a message displays: DICTRA PARROT disabled after using PARROT. To enter DIC_PARROT relaunch Thermo‑Calc and enter these commands starting in the SYS module: GOTO_Module DIC_PAR.
See License Activation and Installation Types for more information about network licenses.