John Hendy <jw.hendy@gmail.com> writes:

> I was just completely baffled for about 5-10 straight minutes as to
> why my block was not producing a  results section with my generated
> graphics file from an R block.
>
> I kept double checking my header options one by one despite having
> simply copied/pasted/modified it from a previous working block. Turns
> out it appears that #+name has a character limit!
>
> This (on Org-mode version 8.0.2 (release_8.0.2-65-g1e32d7)), doesn't work:
>
> #+name: improvement-treatment
>
> It appears the name can be 20 characters long (the above is 21).
>

I don't think there is any name length limit.  The attached example
works for me, and exports w/o problem to HTML.  Maybe I'm not using the
block in the same way as you, but I'm pretty confident there is no name
limit and your problem probably lies elsewhere.