I have been using Psi4 to get to a functional SCF solver (from Dr DePrince's tutorials). This solver needed "libparallel/parallel.h."
I had a fully functional version. Then today, to better control python versions on my laptop, I uninstalled the psi4conda. I reinstalled it as a separate environment from within Anaconda. Now, I can't run the SCF solver since libparallel is missing. I cannot manually find it anywhere within the psi4 environment. Every mention of it on Github leads to a 404 error. Has the folder just disappeared?!
I should add that installation test was fine - 17 passed, 2 skipped - as it was even with my earlier installation.