new comint mod in emacs for plink (putty): Symbol's function definition is void

Question

i want to use a new comint mode for plink(putty), i put the code in init.el, but if M-x run-plink, i got below error:

let*: Symbol\'s function definition is void

Answer 1

To give this question an answer, which is also meaningful for other questions marked as duplicates of this one, but actually are about other packages not being loaded, I will give a more general answer, which should be applicable to the other questions as well.

Generally an error Symbol's function definition is void often indicates, that a package was not loaded, but then someone/something tried to use it.

So the general answer, that you probably need to (require '<package name>) in your init.el, where the package name is the name of the package which provides what is currently void.

Answer 2

You have not loaded library comint. You need to do that before Emacs can know about comint-check-proc.

Add a (require 'comint), either in your init file or near the beginning of run-plink - somewhere before it tries to use comint-check-proc.