Then you have *two* problems …

First off: GREP Styles cannot help you with this, in any way. They CANNOT apply a paragraph style, and they CANNOT apply or check anything outside of their own paragraph. They live in a small, one-paragraph-sized world of their own.

Second: alas, your suggested GREP wouldn’t work either! The basic idea would look like this:

CHAPTER \u+\r.

(the last full stop is important!) Other than my example above, this now also contains ‘all uppercase, any number of them’, so it can match ‘ONE’, ‘TWO’, and ‘THREE’; and if you try it, you will see it grabs a chapter plus number, a next hard return, and a single character of the next paragraph. Should you apply a paragraph style now, then it gets applied to both paragraphs.

But you only want to grab the second, so that’s why you suggested a lookbehind (that’s the part I initially missed). Moving the part before the to-be-adjusted paragraph into a lookbehind, you would get this:

(?<=CHAPTER \u+\r).

and this *ought* to find a single character, with ‘CHAPTER’ (etc) on the line above. But it does not work! The reason is your capitalized numerals have different lengths — ‘ONE’ is 3 characters, ‘TWO’ also 3, and ‘THREE’ has 5 — and a lookbehind cannot test for a variable length of characters. This is just too complicated for a single GREP.

A possible (and tricky) solution is to do multiple tests, each one with a fixed length:

((?<=CHAPTER \u\u\u\r)|(?<=CHAPTER \u\u\u\u)|(?<=CHAPTER \u\u\u\u\u)).

will work for ONE up to TEN (for ELEVEN and/or TWELVE you need to add a 6-uppercase check, after that 8, and so on and so forth).

Use “Retain Formatting”, even though it is slower. Hyperlinks *are* a form of formatting.

With the global update of the entire forum some links appear to be broken. The correct download link to the script is

https://creativepro.com/downloads/forcedl/stateAbbreviations.jsx

AFIK (Away From InDesign Keyboard) at the moment, but you can try this:

\d(?=(\d\d\d)+(?!\d))

instead of Masood’s \d(?=(\d\d\d)+\D)

In essence, it means the same — a digit followed by 3 digits followed by NOT a digit — but there is an essential difference. “\D” is “a character which is not a digit”, but “(?!\d)” means “not a digit”. That last one is also true if *nothing* follows :-)

Would it not be easier (= less work ;-) to *remove* the manually entered page number and replace them with the regular Page Number code? You only have to copy the Page Number Here code once; then you can paste it on every page.

(Technically better would be to entirely remove the old page number text frames, and create them a-new on the original master pages. But that may interfere with other pages as well.)

Paragraph styles cannot remove text. (Nor add it — Space Above and Space Below don’t ‘add’ text.)

Best to use a GREP search-and-replace, because the regular Find/Replace may mess up paragraph styling. Search for this:

(?<=\r)\r

and replace with nothing. This simply looks for a paragraph return which is preceded by another, and removes only the second one.

Alas. All that the blog says is that “some scripts may be broken” — it doesn’t offer a solution, other than waiting for Adobe’s promise to fix things “as soon as possible”.

From your brief description, it seems INX is no longer supported. Inserting formatted text right into a document is horribly slow, so markdownid converts a markdown file to INX, and then reads this into your current document.

That reminds me, hold on while I check.
..
Yup, InDesign CC’s Top New Features still lists “greatest improvements in speed and stability when printing and when exporting PDF and INX files”. So apparently they only broke IMPORTING those INX files.

Do you mean by that it doesn’t work?

I don’t have (nor *want*) CC so I cannot try, but if you get an error message, post what it says and I’ll try some Remote Debugging.