Ultimate Ripping Tool for Second Life - MeshFix v2

Hello, new user here. New to exporting/importing, new to Mesh Fix. After I rez the uploaded mesh, in OpenSim, and drop the client script into it, I get 11 errors (all the exact same one), when the script is saved and attempts to run:

Error: undefined constant/function/variable llLinksetDataRead(string)

How do I get past this?

Thanks for this seemingly wonderful tool - looking forward to using it a lot. :)