Beamer error on Lyx

Paul A. Rubin parubin73 at
Mon Aug 24 14:04:22 UTC 2020

On 8/23/20 7:27 PM, jcredberry at wrote:
> Dear all,
> Trying to open a Beamer presentation that I used for my lectures every 
> year. After some adjustment for this year's lectures, the following 
> error appears when compiling the document:
> ! Package inputenc Error: Keyboard character used is undefined
> (inputenc) in inputencoding `latin9'.
> This is a document that I usually work with on Ubuntu Linux, but that 
> in this case, I opened in Windows 10.
> I changed default coding to UTF-8 instead of inputenc and another 
> error appears. In this case, the small logo in the right corner is not 
> recognized and as the filename is "uct_logo.png", at compilation time 
> it says the file is not found and then a box with "uct_logo" appears, 
> with the "l" in "logo" as a subscript.
> Is this problem a Windows or a Lyx related one? BTW, I am using 
> TeXLive 2019 on this windows computer.
> Regards,
> Julio Rojas
> jcredberry at <mailto:jcredberry at>
Is the logo PNG file in the same directory as the LyX file? If not, have 
you tried specifying the path to it?


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