MATLAB: Do I get the following error while simulating/building the asbQuadcopter model

Question

Why do I get the following error while simulating/building the asbQuadcopter model? 

Answer 1

The asbQuadcopter example loads a few variables into the MATLAB workspace. The above error may occur when the workspace variables, which are required for the model, are deleted by mistake.

In the ‘Project Shortcuts’ tab, click the ‘Initialize Variables’ shortcut. This will initialize all the variables required for the project. Alternatively, you could execute the following command at the MATLAB Command Prompt:

>> startVars