Have you ever gotten the tcsh: Command not found. error after installing some code? Well it happened to me today, and I couldn’t figure out what the problem was. I had already added the commands directory into my PATH, and set it to executable with chmod 755, but still the error kept coming up. The answer turned out to be that the command file (a shell script) that I had download had DOS line endings. Which, I quicly fixed using my trusty bbedit and bingo it worked fine.