Matlab function (fsparse) from github produces an error- why?

So, I'm calling the function "top99neo.m" from this research paper: https://www.topopt.mek.dtu.dk/Apps-and-software/New-99-line-topology-optimization-code-written-in-MATLAB

In order to use this function, I also downloaded the "Fast" package from: https://github.com/stefanengblom/stenglib

I needed this package because it contains "fsparse" which is used by the top99neo.m code. I added the package to my directory. But, everytime I call top99neo(300,100,0.5,3,8.75,3,'N',0.5,2,0.2,500), I get the following error:

Error using fsparse (line 145)
.MEX-file not found on path.

I checked the fsparse.m file and it's all commented out except for "error('.MEX-file not found on path.');". So, I'm confused-- where is the actual fsparse function that top99neo is calling? and why is it not working for me if I added the entire Fast package to my working directory? Thanks!

[Torsten]

https://de.mathworks.com/matlabcentral/answers/562907-promleb-in-fsparse-installation

Answer 1

[Kartik]

Hi Rachel,

From the error message, it seems like the MEX files have not been created yet on your current path. You can try the following steps:

1. Put “Fast” as your current folder.
2. Run the “startup.m” script.
3. Use the “make” command in the MATLAB command window.

MEX files shouldbe created by following the above-mentioned steps.