Font-family error help needed

[VelvetElvis]

I make a point of using the Edit Book function on every book I add to Calibre. In the last few months, I’ve been seeing a warning I’ve never seen before:

“Unexpected missing generic font family (font-family-no-missing-generic-family-keyword)”

I’ve tried using the help link to figure out how to deal with this, as well as searching the Forum, but I’m just not understanding this. The 2 examples shown *look* OK to me, but something isn’t right. Any guidance would be greatly appreciated.

[SomeSteve]

Originally Posted by VelvetElvis

I make a point of using the Edit Book function on every book I add to Calibre. In the last few months, I’ve been seeing a warning I’ve never seen before:

“Unexpected missing generic font family (font-family-no-missing-generic-family-keyword)”

Until someone more knowledgeable chimes in, try removing the quotation marks around "serif" and "sans serif" (or "sans-serif": not sure if it should be hyphenated).

[Quoth]

There are five Generic fall back font-family names:

1. serif
2. sans-serif
3. monospace
4. cursive
5. fantasy

Mobi format only supports the first three (and has no separate CSS anyway).
Each also can be normal, italic, bold or italic bold.
Oblique is a special decoration, not needing an italic font. Cursive is also unrelated to italic. Note that some letters in an italic font are a different style, depending on font. Oblique simply slants the selected font.

There is a hyphen and no quotes.
Quotes are only used on other fonts that have a space in the name.

Examples
https://www.w3schools.com/Css/css_font_fallbacks.asp
CSS

body {
  font-family: "Courier New", Courier, monospace;
}

[VelvetElvis]

Originally Posted by SomeSteve

Until someone more knowledgeable chimes in, try removing the quotation marks around "serif" and "sans serif" (or "sans-serif": not sure if it should be hyphenated).

Well colour me dumb.
I did try to remove the quotes previously, to no avail, but your tip about hyphenation did the trick.
Thank you!

[VelvetElvis]

Originally Posted by Quoth

There are five Generic fall back font-family names:

1. serif
2. sans-serif
3. monospace
4. cursive
5. fantasy

Mobi format only supports the first three (and has no separate CSS anyway).
Each also can be normal, italic, bold or italic bold.
Oblique is a special decoration, not needing an italic font. Cursive is also unrelated to italic. Note that some letters in an italic font are a different style, depending on font. Oblique simply slants the selected font.

There is a hyphen and no quotes.
Quotes are only used on other fonts that have a space in the name.

Examples
https://www.w3schools.com/Css/css_font_fallbacks.asp
CSS

body {
  font-family: "Courier New", Courier, monospace;
}

Thank you!
Not sure how I missed the hyphenation, but that did the trick.

[theducks]

Originally Posted by SomeSteve

Until someone more knowledgeable chimes in, try removing the quotation marks around "serif" and "sans serif" (or "sans-serif": not sure if it should be hyphenated).

That is the correct fix.
These are keywords and do not get quoted like a font name would.
@quoth has listed these (keyword) names.
Rumor has it that Kobo does NOT include monospace on the device. You must embed

[VelvetElvis]

Originally Posted by theducks

That is the correct fix.
These are keywords and do not get quoted like a font name would.
@quoth has listed these (keyword) names.
Rumor has it that Kobo does NOT include monospace on the device. You must embed

Thank you. Problem solved.

[JSWolf]

Originally Posted by theducks

That is the correct fix.
These are keywords and do not get quoted like a font name would.
@quoth has listed these (keyword) names.
Rumor has it that Kobo does NOT include monospace on the device. You must embed

On a Kobo, you have to embed for KePub. But as long as you have a monospace font family internally names as Courier (I'm not 100% sure, but you may just have to have the internal name start as Courier). You can display monospace fonts from ePub without having to embed. But you do need code in CSS to reference the font on the Kobo.