Hi Leonard,

Thanks for the very speedy feedback.

I am using Adobe Acrobat 9 Pro, Version 9.1.1 on Windows XP.

I am going to repeat my steps here, just to be sure.
1) Start Acrobat
2) Open original file (without trailer) (sorry I can not supply this -- it has confidential information from a 3rd party)
3) Choose TouchUp Object tool (this PDF only has 2 images)
4) Right click each of the 2 images, and choose "delete"
5) Choose File -> Save As
6) Enter "leonard.pdf" for the file name (Save as type: Adobe PDF File)\
7) Exit

The file I just produced is attached.

Thanks,
-Paul

Yes, I produced the file as follows:

Leonard Rosenthol wrote:
Yes – without the trailer you can’t find anything else in the PDF.

I find it VERY hard to believe that you saved that file from Adobe Acrobat 9.x – it would have a trailer. Please provide the file that you opened originally in Acrobat 9 and then any information about the saving process. Did you just do File->Save? Save As? Other? Is this 9.0, 9.1, 9.1.1 or 9.1.2? On what OS platform?

Leonard


On 6/11/09 2:19 PM, "Paul Gatewood" <[email protected]> wrote:

    Is the trailer element always required in a PDF document?

    I have recently encountered documents without the trailer (IOException
    "trailer not found" when instantiating PdfReader).

    In the past, the "save as" feature of Acrobat produced a PDF with the
    trailer.

    Now I am using Acrobat 9 and the "save as" does not add the trailer (at
    least to the files I am encountering at the moment).

    Looking at the PDF specification at
    http://www.adobe.com/devnet/acrobat/pdfs/PDF32000_2008.pdf (I hope this
    is the right location), I see at the end of section 7.5.8.1 the
    following:

         "The value following the startxref keyword shall be the offset of
    the cross-reference stream rather than the xrefkeyword. For files that
    use cross-reference streams entirely (that is, files that are not
    hybrid-reference files; see 7.5.8.4, "Compatibility with Applications
    That Do Not Support Compressed Reference Streams"), the keywords xref
    and trailer shall no longer be used. Therefore, with the exception of
    the startxref address %%EOFsegment and comments, a file may be entirely
    a sequence of objects."

    I am in no way a PDF expert, so I don't know whether this is apropos to
    this situation or not, but I am trying to do homework before asking for
    help :-)

    I can not supply the PDF I received, due to its confidential content.
    I have, however, edited it with Acrobat 9 to remove all the content I
    could see, then saved it ("save as") to a file called
    test-saved-from-acrobat-9.pdf, which I am attaching.

    So, does anyone know more about this, i.e. whether in this situation it
    really is legitimate that the trailer is omitted?

    And if so, is there a way to deal with this in iText?  I am currently
    using iText 2.1.4.


--
Leonard Rosenthol
PDF Standards Architect
Adobe Systems Incorporated


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<<inline: leonard.pdf>>

------------------------------------------------------------------------------
Crystal Reports - New Free Runtime and 30 Day Trial
Check out the new simplified licensing option that enables unlimited
royalty-free distribution of the report engine for externally facing 
server and web deployment.
http://p.sf.net/sfu/businessobjects
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Buy the iText book: http://www.1t3xt.com/docs/book.php
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http://www.1t3xt.info/examples/
You can also search the keywords list: http://1t3xt.info/tutorials/keywords/

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