Yes, dubb45's advice solved my issue, however I had to manually download the source code for the Carloop library and add it to the program. I'm not sure why "Include in Project" wouldn't work, but adding the files themselves cleared up the issue.
For reference, I attempted to do so on both ParticleBuild and ParticleDev.
Thank you both for your help!!
Also, I'm not entirely sure how to mark this issue as [SOLVED], but if someone can provide insight, I will gladly do so~