Aaah, that is an embarrassingly simple solution. It seems that this option is default in most of the other org-babel languages and I didn't know about it. Works now. Many thanks! Jakob Neil Jerram writes: > I'm completely guessing - but does it help to add :results output ? > > On 24 November 2017 10:06:12 GMT+00:00, Jakob Simeth wrote: >>Hi, >> >>I seem to have problems with lua source blocks (others are working >>fine): When evaluating a simple block like >> >>#+BEGIN_SRC lua >>print("Hello world!") >>#+END_SRC >> >>I get an empty RESULT block, and the message "evaluation complete". >>I am running org-9.1.3 (within the spacemacs org layer). >> >>Is lua still officially supported? ob-lua.el seems to be part of >>org-plus-contrib and lua is listed on >>http://orgmode.org/org.html#Languages >> >>However, not on >>http://orgmode.org/worg/org-contrib/babel/languages.html >> >>Is there a way to "debug" this? >> >>Thank you, >>Jakob >> >> >>-- >>Jakob Simeth >>=================================================================== >>GPG: AD0B55F959F83D14C6CA28153BE2F106425CBE4E -- Jakob Simeth =================================================================== GPG: AD0B55F959F83D14C6CA28153BE2F106425CBE4E