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

[Paul Rubin]

On 3/15/24 16:14, Rich Shepard wrote:
> On Fri, 15 Mar 2024, Rich Shepard wrote:
>
>> Apparently so. Careful re-entering the ERT allowed the doc to compile.
>
> I was wrong. I cannot get an simple equation to compile via the menus or
> ERT.
>
> I copied the real doc.lyx to mwe.lyx and deleted everything above and 
> below
> the paragraph with the equation. That non-printable character shows up 
> even
> with a minimal entry in the ERT, regardless of whether the backslash is
> entered.
>
> I'm totally lost and need advice on what might cause this issue.
>
> mwe.lyx attached.
>
> Rich
>
In your latest MWE, the backslash before x causes an unrelated 
compilation error, because \x is not a known function.

As for the mystery non-printing character between the ERT box and the 
following comma, I cannot reproduce that. When you insert the ERT box, 
do you type ctrl-L? Assuming so, after filling in the equation in the 
box do you just cursor out of the box and type the comma?

Paul