I defined a function in my .emacs file, and I want to call it when a major mode is loaded. My function is interactive.
If I invoke my function by M-x, everything seems alright. But if I invoke my function from the mode hook, I got below error:
File mode specification error: (void-variable set-color-theme)
But actually, the function has been invoked correctly. So, I do not understand why it reports the variable is void.