Acrobat 9 can read pdfs created by version 1. There is something else going on. Open the pdf file in a text editor (nor word processor) and read off the first few characters. What are they? Can you post a sample file somewhere (without compromising copyright)?
Here is the first 4 lines
1 0 obj
I put one of the smaller files from the CD at
I confirmed this file opens in Acrobat v3, and not in 9
Also, here is a pdf of how it looks on the old version.
The PDF document isn't accessable.
Acrobat Reader 3 can decrypt the content of the file. Acrobat Reader 5, Adobe Reader 8, and Adobe Reader 9 can't decrypt the file.
So that means that any CDs with documents I bought are now useless? Is there a conversion tool available? I wonder how many documents scanned and stored away in archives are now useless. Argh!
Why would such functionality be removed? Am I plain out of luck?
Old PDF documents without security can be viewed with the new Adobe Reader.
For the use of your documents you can install Acrobat Reader 3.
I have tried every way I can imagine to open the sample document you posted. I have tried a multitude of open source PDF readers/creators/converters as well as Web-based tools for such to no avail. Reader 3.0.1 which I installed on one of my test boxes will in fact open the first page of the document, but the font appears as it was done with an extremely shaky hand and no other pages of the document will display.
The way I see it, you have a couple options. You could install the trial version of Acrobat which works for 30 days. Included with that is a PDF document printer which you should be able to use to "print" to from Reader 3.0. Personally, I would be concerned that once Acrobat was installed, the document would no longer display properly in Reader 3.0 but it's possible it will work as expected.
If it was me and I wanted to have access to the files in question on the CD, I would:
1. Search the manufacturer's Website for copies of the documents in question and save them to my system for safe keeping.
2. If the documents are not available online, I would install Microsoft's XPS Document Writer (MS's version of PDF). Using the XPS doc writer as your printer, "print" the documents which will save them as a XPS document (proprietary image format). You would lose the ability to copy/search text but you would at the very least have all the information within the documents and wouldn't have to keep that beast around just to have access to the documents in question.
I hope this helps!
Yeah, the document is a scan of an old book, so it looks shaky, but is readable (in reader 3). There was no search capability anyways as it was all pictures (I think) and not text.
Unfortunately, the manufacturer does not exist anymore.
I will see what I can do with your suggestions. Thanks!