I have just updated to latest Atahualpa version. The error messages I get, complaints about "Undefined index: full_width_header in /Applications/MAMP/htdocs/livereporting24/wp-content/themes/atahualpa/header.php".

When in my admin page, I go to the Atahualpha Theme Options (ATO) and "Style And Edit Header Area", I find an option "Full width header". However, this option box has no content. So I cannot select "Yes" or "No". The result is, that in my header.php page, there is a full_with_header variable that is not defined.

How do I go from here, to fix this?

go to ATO->Export/Import and export your settings. Then attach them to a reply.

Here it is

try this updated version of your file

Thank you very much, that solved the issue.