Ibooks do not open my pdf anymore

i downloaded some pdf from my unis webside and opened them in ibooks.
But since 3 days i can not open them, only the books.
I had no update or any change on the ipad.
When i tip on the pdf it is only grey.
Please help.

The file in usb is definitely damaged because it is 200 MB compared to around 1 GB it should be.
When I worked with the MacBook directly on usb I think that once the file is damaged during the last save (I did not realize this before).
In iMac I overwrite the original file with that of USB. Result: I have two files of about 200 MB (one in usb and one in iMac) that do not open.
Now I have only an older version that opens but I lack the important text that I wrote later. I retrieved other files previous Iba with the software diskdrill including one from a GB or so and very recently (4 days before) but it does not open.
I'm interested to recover all the possible text from the file iba that I have.
I know the possibility to send at someone to Apple the file groped for a recovery or at least extrapolation of data (I am interested only written texts).
Can you give me please an email to send the file (I send the link to download it)?
Thank you very much!

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IBooks does not open. It only briefly shows an empty bookcase. I have all my important .pdf reference documents in my library. I was never able to figure out how to backup ibooks. I am afraid to reinstall the apps risking loss of data. Any way to save?

IBooks will not open with new ipad and upgraded iOS. It only opens briefly to show an empty bookcase. I installed the most recent update of iBooks. In apps store it says 'open'. But the same thing happens...a brief flash. Strangely, the image and list of my collection actually shows in miniature with all the open apps; so I can close it as I do any other app.
I have all my important .pdf reference documents in my library. I am afraid to reinstall the apps risking loss of data. I was never able to figure out how to backup ibooks. Any way to save without access to the program?

Now that you have your PDFs on your computer's iTunes library you could try deleting and redownloading the app, and then sync the PDFs back to it - as long as you continue to keep a copy of the PDFs on your computer (and preferably on a backup as well) then if the same thing happens again then you could delete and reinstall again (you shouldn't have any problems with the iBooks app, but then you shouldn't have had a problem this time either).
You could try GoodReader (you could have the most important PDFs in both) - but the current version on iOS 7 isn't getting very good reviews in terms of its speed and crashes (it's description page says that a major update is coming soon).

Adobe Reader could not open 'filename.pdf'" because it is either not a supported file type...

I have a website that holds 23 different PDF's. They all download fine and open correctly when downloading from a Mac computer. They even download and open fine from a Mobile Phone. However my client is getting an error over and over again. I have tested it out and this is what I have come up with.
Error:
Adobe Reader could not open 'filename.pdf'" because it is either not a supported file type or because the file has been corrupted (for example, it was sent as an email attachment and wasn't correctly decoded)
I have resaved the PDF's to be compatible with Reader 6.
Works fine with
All Mac's using either Firefox, Chrome or Safari using Pro and Reader
iPhone downloads using iBook
PC's when downloading from Firefox viewing in Reader 9
PC's when downloading from IE 6.0 view on Reader 8
Error Message When
PC when downloading from IE 7 viewing on Reeder 9
PC when downloading from IE 8 viewing on Reader 9
Here goes the URL when the files resides.
Please help. I can not find a solution.

Hi i have solved the ie bug creating the pdf phisically, this is the code i use:
$hostname = "XXXXXX";
$database = "XXXXX";
$username = "XXXXX";
$password = "XXXXXX";
$db = mysql_pconnect($hostname, $username, $password) or trigger_error(mysql_error(),E_USER_ERROR);
mysql_select_db($database, $db);
$query_rs_docs = "SELECT * FROM doc WHERE doc_name='".$_GET['doc_name']."'";
$rs_docs = mysql_query($query_rs_docs, $db) or die(mysql_error());
$row_rs_docs = mysql_fetch_assoc($rs_docs);
$totalRows_rs_docs = mysql_num_rows($rs_docs);
$t_pdf = fopen("/path to doc folder/doc/".$row_rs_docs['doc_name'], "w+");
fwrite($t_pdf, $row_rs_docs['doc_file']);
fclose($t_pdf);
header('Location: http://www.portalesardegna.com/doc/'.$row_rs_docs['doc_name']);
the db table (doc_name must contain the .pdf extension):
CREATE TABLE IF NOT EXISTS `doc` (
`doc_ID` int(10) NOT NULL auto_increment,
`doc_name` varchar(255) NOT NULL,
`doc_file` longblob NOT NULL
PRIMARY KEY (`doc_ID`)
) ENGINE=MyISAM;
Message was edited by: Portale Sardegna

"Adobe Reader could not open 'filename.pdf' because it either...

The full error message reads: "Abobe Reader could not open 'filename.pdf' because it is either not a supported file type or because the file has been damaged (for example, it was sent as an email attachment and wasn't correctly decoded)."
I understand this is a common problem, but I have yet to see a clearly defined answer. I am running the latest update of Abobe Reader 9.3 on Windows 7. It didn't work on other updates either.
I received the file as an e-mail attachment, along with some other PDFs. All of them can be opened except this one. I tried forwarding the e-mail to other servers (i.e. Hotmail) and I couldn't open it there either.
I have tried opening it directly from the Adobe Reader program, latest version of IE, and latest version of Firefox. I have tried unchecking the "Display PDF in Browser" box under Edit > Preferences. I have tried changing the file name and adding ".pdf" to the end of it. Nothing works.
The file says "27 KB" which sounds a little low to me since this should be a fair-sized document, but doesn't read "0 KB" as others with this problem have noted.
Any help with this issue so this question can finally be resolved for the hundreds of people that have had this error message would be greatly appreciated.
Thanks.

brittnic2008 wrote:
Any help with this issue so this question can finally be resolved for the hundreds of people that have had this error message would be greatly appreciated.
Thanks.
There has been tons of help on this issue.
The official word is, ZIP the PDF's before emailing or post them to a website and email a link to them. Some email clients use encoding (Adobe can't do anything about that part) and when the file is decoded at the other end, it is corrupted. It can happen to some of them or all of them.

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That looks like a perfectly good PDF, but since it's trying to open in Microsoft Word, that means your file association for .pdf files is incorrect. You should change it to point to Adobe Reader instead of Word.
If you are on Windows, see http://windows.microsoft.com/en-us/windows/change-file-open-program#1TC=windows-7

Adobe Reader could not open a pdf file - either not supported file type or file damaged

On March 5th, I started getting the Adobe Reader error message "Adobe Reader could not open a pdf file because it is either not supported file type or the file has been damaged.
I get this when I try to open the pdf file as an attachment in Outlook 2013 from my G-Mail account. If I save the attachment and then try to open the pdf document, I get the same error4.
I get this error message with every pdf file that now comes to me in Outlook.
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I copied it again. Do you see it? BTW, how do I set privacy? (I'm new at this)
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd
>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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I loaded adobe reader and I can not open a pdf file. It keeps telling me I need adobe acrobat.

What is your operating system?
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Hey ilyaz20360341,
Could you please specify how exactly did you transfer Acrobat from one MAC to other.
You might need to deactivate the software from your old machine and then activate it on the new one with the same serial number (for Acrobat license) or Adobe credentials (for Acrobat subscription).
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I have adobe reader 11.0 it will not open a pdf file

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Can you please send process monitor logs:
To take process monitor log follow the below steps:
1) Download process monitor from http://technet.microsoft.com/en-in/sysinternals/bb896645.aspx
2) Launch process monitor.
3) Now try to open the PDF file at network share. It will not open with the network error so just cancel the error dialog.
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Try above workflows with Protected Mode checkbox checked.
Thanks,
Shakti K

Ibooks do not open my pdf anymore

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