Inline math: one ERT compiles, the other doesn't (fwd)

[Paul Rubin]

On 3/15/24 10:59, Rich Shepard wrote:
> On Fri, 15 Mar 2024, Rich Shepard wrote:
>
>> What's the difference causing this discrepancy? How do I write the 
>> second
>> line so it builds without complaint?
>
> Looking at the mwe.lyx file in emacs I see that control character on line
> 137. It's not at line 118 which is the same position for the first line.
>
> Why?
>
> Rich
There's nothing inherent in the content causing this. I opened your 
mwe.lyx file in LyX and, after confirming the error, deleted the second 
ERT box and trailing comma, confirmed what was left compiled without 
error, then typed the ERT box and content (and trailing comma) back in. 
The document compiled without problem.

So the question is, how did you create the second part of the example 
file? Most likely something you did inadvertently inserted the problem 
character.

Paul