On Sat, 15 Jun 2019, Hans van der Meer wrote:

From \ctxlua{tex.print(hvdm.myluacall("\xmlatt{#1}{argument}"))} Lua returns a string containing newline characters '\n'.

In ConTeXt this returned string is printed as one line, the embedded newlines are not honoured. I thought to replace with \crlf in this manner: string1 .. "\\crlf" .. string2 but the returned \crlf are not executed as such.

How to force \crlf's in the executed return?

Hard to say without a minimal example, but how about: \startluacode context.startlines() context(hvdm.myluacall("\xmlatt{#1}{argument}")) context.stoplines() \stopluacode or \startlines \ctxlua{context(hvdm.myluacall("\xmlatt{#1}{argument}))} \stoplines Aditya