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Did you create the PDF documents? Can you open the files from the CD?
We get the PDF files emailed to us from various different companies. From here, we put the files onto disc and forward it on.
I've tried opening the files, from the exact discs, and I have no problems in doing so.
They've sent the CD's back with a note telling us that they cannot open the PDF files as their computer won't read them.
We've never had a problem like this before.
Do you think the problem could be that we're using Adobe 8, whilst they have Adobe 5? Or that we're using XP, and they're using Windows 2000?
May be a problem of the CDROM device. Can they copy the files from the CD to a local drive?
The person we sent the files to didn't try that; just sent the discs back straight away! We've emailed her now, asking whether she attempted to copy the files to a local drive or not.
So you don't think it has anything to do with the OS or versions of Adobe?
Thanks for your help.
That isn't a OS issue. When you open a new PDF document with a old version of Adobe Reader you will get a other message.
Thanks for your help on this, Bernd.
We're just waiting for her to get back to us on it.
Never had this problem, very strange indeed!
I have a similar problem when I save an Adobe 8.0 file on a CD and try to open it on another older computer using adobe 5.0.
I get the message that the file is damaged and can't be repaired.
The old computer has Windows 98 1st ED,so I can't update adobe on it.
A possible cause for this are "xref streams" (and "object streams"),
introduced in PDF 1.5.
Reader 5 handles PDF versions up to 1.4. If the PDFs you have use "xref
streams", then older readers won't be able to open them at all. [There also
exist "hybrid ref PDFs", that can be opened with older readers but with
reduced capabilities.] If you can put such a PDF somewhere publicly
available and post a link here, I can take a look to see if it's this case.
All that you can do is convert these PDFs to 1.4 or an earlyer version. I
think Acrobat 6 and later (the full version, not the Reader) can do this.
They will be larger, as the "xref/object streams" produce better
compression, but compatible with older readers.