On Sun, 25 Dec 2016, joakim@verona.se wrote:

> aaermolov@gmail.com writes:
>
>> Hi all!
>>
>> Recently I've experienced a kind of a problem - my literate Emacs config
>> stopped tangling correctly, only a subset of code blocks were found in
>> resulting .el file.
>> I've looked at it a bit closer and it seems now (not earlier than 9.0.2)
>> the :tangle clause became required. I've searched Org repo but failed to
>> find a respective commit or any reference to the relevant info.
>

I don't think the problem lies with any revision to org.

First, what `C-h v org-babel-default-header-args RET' shows below is
unchanged for at least a year:

--8<---------------cut here---------------start------------->8---

org-babel-default-header-args is a variable defined in ¡ob-core.el¢.
Its value is ((:session . "none")
  (:results . "replace")
  (:exports . "code")
  (:cache . "no")
  (:noweb . "no")
  (:hlines . "no")
  (:tangle . "no"))

...
--8<---------------cut here---------------end--------------->8---

Note that `(:tangle . "no")' sets the default behavior.

Second, I have files that depend on the above. i.e. I set the header
on a few blocks to `:tangle yes' and leave the rest alone, relying on
the above default to keep them from being tangled.


> I also experienced the same behaviour. :tangle became required, which it
> wasn't previously.
>
> My solution was just to add the ":tangle yes" tag everywhere.
>
>
>>
>> Can anyone point me to the right direction?
>>

Use

#+PROPERTY: header-args :tangle yes

(and type `C-c C-c' to reset the buffer the first time you type it)

and review

(info "(org) Using header arguments")

for tips on how to control the application of header args.

HTH,

Chuck