AUCTeX error 127

Question

I'm trying to call AUCTeX from Emacs and I'm now getting the following error (quote marks changed slightly to get code block below to work):

Running 'TeX' on 'simple' with ''pdf/Users/myname/bin/pdflatex  -file-line-error   -interaction=nonstopmode  simple.tex''
/bin/sh: pdf/Users/myname/bin/pdflatex: No such file or directory

TeX Output exited abnormally with code 127 at Thu Jun  2 16:53:50

I've checked paths which seemed like they would be the problem, but couldn't find anything. I also executed M-x shell and entered

pdflatex —version

Which worked just fine, returning MiKTeX-pdfTeX 4.10 (MiKTeX 22.1) …as well as plenty of normal looking copyrights and trademarks and compilation information.

So where do I go from here?

I’m running Emacs Version 28.1 (9.0) on a Mac mini M1 with macOS Monterey 12.4.

EDIT: As requested in the comments below, I've added that part of my .emacs file showing my attempt to set up AUCTeX:

(setq TeX-auto-save t)
(setq TeX-parse-self t)

;; trying to get AUCTeX to work
(setenv "PATH" (concat (getenv "PATH") ":/Users/myname/bin"))
(setq exec-path (append exec-path '("/Users/myname/bin")))
(setq exec-path (append exec-path '("/Library/TeX/texbin")))

(add-to-list 'exec-path "~/bin")
(add-to-list 'exec-path "/Library/TeX/texbin")
(setenv "PATH" (concat "/Library/TeX/texbin:"
                       (getenv "PATH")))
(setq TeX-command "/Users/myname/bin/pdflatex")
(setq LaTeX-command "latex")

Answer 1

To summarise the comments: this was a misconfiguration. The documentation of TeX-command (do C-h v TeX-command <RET>) says:

TeX-command is a variable defined in ‘tex.el’.

Its value is "tex"

Command to run plain TeX.

However the sexp,

(setq TeX-command "/Users/myname/bin/pdflatex")

sets it to be a path which causes auctex to construct a broken shell command to run TeX:

pdf/Users/myname/bin/pdflatex -file-line-error -interaction=nonstopmode simple.tex

Solution: delete that sexp!