Hope this will be an easily answered question. For one of the PDFs I’m trying to add, DTPO doesn’t seem to recognise it as a PDF, I don’t think. It states ‘pdf’ (in lower case) for kind, but the preview pane just has the PDF icon. When I open it up, it opens it in Adobe (which is the default), as opposed to opening up as a seperate window in DTPO, which is what it normally does for PDFs. Trying to convert it to Searchable does nothing.
It’s a scan of a USAF Historical doc. The three others I downloaded from that site (afhra.af.mil/Information/Studies/) are recognised fine (including converting to Searchable), just not this one (#37 as it happens). Downloading again doesn’t seem to make any difference. Skim also opens the PDF.
Odd, now I can’t open it in Skim either. I think I’ll have to let this one go. I’m just wondering about the process and if it can be worked around in any way.
Hmm, only gives me the option to save as an Adobe PDF file, and then when I try and do that, comes up with an error message “The document could not be saved. There was a problem reading this document (109).”
I’m curious Bluefrog, is there an especial reason you don’t use Acrobat? And is there somewhere you can point me to in regards to different ‘types’ of PDF?
There’s no need for it, as Apple provides Preview and DEVONthink can also display and annotate PDFs, in general.
Also, Acrobat installs browser plugins that can be problematic.
But it’s a larger topic than that, as you’ll note by the last paragraph and video at the bottom of the page. PDFs can be created in a variety of ways, yielding PDFs that may not conform to expected standards. You can even create PDFs in a text editor, if you’re willing to dig that hard. (I have. )
Because of this, you should not expect a PDF “to be a PDF”, unless you generated it yourself through a known mechanism. They should generally work, but don’t expect it to always be trouble-free.
You might want to try downloading #37 again. I downloaded it using Safari and it opened fine in Preview. I added it to DTPO and ran the OCR conversion, and it did report an error on page 272. As page 272 was a blank page of the actual scan, and page 273 was just a blank PDF page, I deleted both and ran OCR successfully.
Though I didn’t run OCR on it, I can confirm Greg’s finding about downloading the file from Safari. That one imported and displayed correctly.
I had initially downloaded it from Opera.
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Just downloaded it from Opera again, and it behaves as expected.
I think it’s a one-off problem.
Still no joy actually, even when I downloaded with Safari - still can’t open in Preview, only in Adobe. Greg, would you be able to send me the doc you have OCR’d?
From my side, I’m going to put this one down to gremlins, it being it an Air Force doc and all!
I’m pretty sure I deleted the OCR document on Sunday, but I’ll put put a copy of the original, with the two problematic pages deleted, on Dropbox for a few days. * Edited to remove the link.
If this one doesn’t open in Preview, then there is something unique to your system that is creating a conflict. The first thing I would suggest to try and resolve the problem is to delete Adobe Reader.
I was also having a problem with PDF files exported from DevonAgent being read by Adobe Acrobat Reader (why the hell did install that nightmare?) Adobe is notoriously hard to exorcise and even after using CleanApp I had to do this:
and even then Lingon found two running services which I also deleted. I think it is finally gone completely but it seems I will have to redownload whatever PDF files came from DA to get them recognized by Preview which is what I want.
I’m a little torn on Adobe. I realise that it’s a bit like Japanese knotweed, but on the other hand, it was the only reader capable of actually opening that PDF, and as I can’t rely on the kindness of strangers all the time, I’m loath to delete an app that meant I could at least read the PDF.