Hi Baertram and Sharlikran!
Today I found this error
pattern parsing error stack traceback:[C]: in function 'string.find' user:/AddOns/LoreBooks/LoreBooks.lua:893: in function 'IsFoundInLoreLibrary'
and I'm sure it tells me about LoreBooks
so I'm posting it
here in Lorebooks comments section.
Thank you in advance to Sharlikran.