---
title: "Using the variable scheme to update VSKs"
canonical: "https://help.vicon.com/space/ProCalc16/12650595/Using%20the%20variable%20scheme%20to%20update%20VSKs"
format: markdown
---
When your variable scheme is finished, you can use it to update VSK with your new joint centers and segment orientations.

**To update a VSK with the variable scheme:**

1. In Nexus, create a subject in the normal way (ie, from a labeling template VST file), and enter any required subject measurements.
2. Capture or load a static trial, and label it, either by using the **Autolabel Static Frame** function, or manually.  
:warning:** Important: **It is NOT necessary to run the other operations that scale/calibrate the subject.
3. When the static trial has been correctly labeled, save the trial by clicking the **Save** button, so that both the subject's VSK and the C3D are saved.
4. In ProCalc 1.3 or later, load the trial.
5. Specify any relevant **Input Parameters** or **Variables** schemes that are used in defining your model
6. On the **Data Management** tab, click the **Update VSK** button.
7. Review and accept any prompts that are displayed.   
When the operation starts, information about the progress is output to ProCalc's log.
8. In Nexus, do one of the following:
  - Nexus 2.9 and later: Right-click the subject and select **Refresh Subject** then **From VSK**.  
or
  - Earlier versions of Nexus: Exit the session and open the session again (or re-start Nexus).
9. In the **Subject Viewer**, make sure that the subject is updated.

You can now use the updated VSK to:

- Label dynamic trials.
- Generate kinematics in real-time or offline.
  To generate real-time kinematics, make sure the processing level in Nexus is set to Kinematic Fit (**Local Vicon System** > **Processing Level**).
  To generate offline kinematics, either click the Nexus **KinFit** button > Macro (inline-media-image)

 or run the **Kinemetic Fit** pipeline.