Colorscheme Errors (E185) with vimrc and sessions

Question

I have a couple of things which suggest there's an issue with the way I use colorscheme with my vimrc file.

• Errors when running source ~/.vimrc
• The colorscheme used when opening a vim session

---

Sourcing vimrc

If I update my vimrc file and source it to see the changes in my current session I get the following error:

Error detected while processing /usr/share/vim/vim80/syntax/synload.vim:
line   19:
E185: Cannot find color scheme 'vim-monokai-tasty'

Despite the complaint the colour scheme does seem to update to be monokai-tasty. The colour scheme is at ~/.vim/colors/monokai-tasty.vim.

---

Vim Sessions

If I start a vim session with vim -S /path/to/session.vim some colour scheme, other than monokai-tasty is used. This would be a time where I may use :source ~/.vimrc and get the above errors, but also the correct colour scheme.

Saving the vim session after making changes to the colour scheme seems to have no effect upon starting a new session.

---

Any help would be greatly appreciated. Here is where you can find my vim and vim/colors directories

Answer 1

The colorscheme in question, "monokai-tasty.vim" does not properly set g:colors_name:

let g:colors_name = "vim-monokai-tasty"

g:colors_name should be set to the file name of the colorscheme without the .vim. Correct:

let g:colors_name = "monokai-tasty"

When the two differ, setting colorscheme initially appears to work. However there are instances where vim reloads the colorscheme, and it uses g:colors_name to do that. At that point the error will be generated.