The error may be related the file containing the implementation of the function in the error message being missing, or a licensing issue. To check if the file is missing, try running the following in the MATLAB Command Window
>> which -all saeroclockpacer
This command should return the full path for the file.
To make sure the license is valid, run the following command in the MATLAB Command Window
>> license checkout Aerospace_Blockset
If the above does not return 1, there is a licensing issue