I have been trying to copy and paste some code into LyX (via the 'Program Listings' menu item), and when I compile the document I get the LyX error:

```
Could not find LaTeX command for character '' (code point 0x2009)

```

LyX also suggested I convert the document I am attempting to copy and paste to UTF-8. However, I ran a `file --mime <mycodefile.py>` and a `file --mime <mycodefile.py>` and both return `charset=us-ascii`. 

Correct if I'm wrong, but isn't ascii a subset of UTF-8? If so, where is this offending 0x2009 character coming from, and how to I fix this issue?

Thanks

Note: instead of copying and pasting, I tried using 'Insert> File > Plain Text ...', and I got the same error. So it's not like the text is being reencoded somehow in the clipboard.

**EDIT**:

for some reason, after restarting lyx i could compile (slaps forehead). when I copy/pasted originally, the encoding may have been unicode, but then I cntl-Z'd and switched it to UTF-8 using vim. This error somehow persisted until restart.