Font not found error in PDF? - Page 1
Forum section: electronics / general

author: MrOmnos
author_rank: Frequent Contributor
timestamp: October 02, 2016, 03:57:01 pm
content: I am trying to design a pair of vivaldi antennas for my project. While looking for materials online I found this old (2001) MS project report from University of Kansas. This report is what I was looking for but it seems my Acrobat Reader is having problems opening it. It's opens but the after scrolling a few pages (after page 5) I get an error saying"Cannot extract embedded font 'DDL000000' Some characters may not display or print correctly "It seems to be affecting the equations in the paper. Isn't the whole point of pdf to avoid pain in ass issues like 'missing font', 'incorrect versions' and other headaches usually associated with other word processing applications like MS word. Does anyone know the solution?I have uploaded the pdf.https://www.dropbox.com/s/5mkpudoqn5ax0vk/ravi_prakash_rajaraman_thesis.pdf?dl=0

author: retiredcaps
author_rank: Super Contributor
timestamp: October 02, 2016, 04:07:24 pm
content: Works in chrome pdf browser.

author: PA0PBZ
author_rank: Super Contributor
timestamp: October 02, 2016, 04:24:57 pm
content: Quote from: retiredcaps on October 02, 2016, 04:07:24 pmIt doesn't. There is no error message but the equations on page 7 ( 2.1.3 Radiation ) are missing.

author: retiredcaps
author_rank: Super Contributor
timestamp: October 02, 2016, 04:39:59 pm
content: Quote from: PA0PBZ on October 02, 2016, 04:24:57 pmYes, you are correct. I only went to page 5 as OP wrote and didn't bother to look any further.

author: GreyWoolfe
author_rank: Unknown
timestamp: October 02, 2016, 05:43:52 pm
content: Were they La primavera, L'estate, L'autunno or L'inverno antennas? That could be part of the problem. (Sorry, couldn't resist, love Vivaldi's, Le Quattro Stagioni)

author: PA0PBZ
author_rank: Super Contributor
timestamp: October 02, 2016, 06:29:50 pm
content: I checked about 8 different versions and they all have the problem. Found even one that is readable online but again the equations are missing.So I give up

author: MrOmnos
author_rank: Frequent Contributor
timestamp: October 02, 2016, 06:46:00 pm
content: Quote from: PA0PBZ on October 02, 2016, 06:29:50 pmLol thanks!! I will make do.

author: TerraHertz
author_rank: Super Contributor
timestamp: October 03, 2016, 10:15:34 am
content: Standard PDF makes the assumption that local reader utils have the necessary fonts. Which often leads to this missing font problem. The name 'portable document format' is a lie. It should be 'proprietary document format'.There is an extension, PDF/A that requires all needed font information to be included in the file:QuoteThe problem with this, is the extension was added after the ISO took over the PDF standard from Adobe. And ISO charges a fortune for all standards docs, so you and I can't afford them.For more info see:http://everist.org/archives/links/__PDF_reversing_info_pub.txt

author: amyk
author_rank: Super Contributor
timestamp: October 03, 2016, 11:07:31 am
content: The font is there alright; it just apparently doesn't contain anything but the letter f, a full stop, and a forward slash. I extracted it and it's only 752 bytes, so I'm pretty sure it doesn't have anything else.On the other hand, if I open the PDF in an editor, select those "missing" sections, and change the font, the text shows up. It doesn't appear to be equations, as those seem to be intact.@TerraHertz you can find the (ironically enough) PDFs of the standard with some careful searching