Whenever you get an error that references an error number, you can usually get more information about that particular error by holding down the Ctrl key when you click on the OK button on the dialog. The error message you get at first is for people who don't know about the internal structure of PDF files. The error you get when holding down the Ctrl key is more technical. You see the same generic error message for a lot of different error conditions, but again, the Ctrl key gives you access to more information. Most people would only get confused by this lower level message.
If this happens with the same file on a number of different computers, then you are very likely correct, this has to do with that specific file, and the most likely reason is that the file is corrupt. Unfortunately, there is nothing you can do about that - besides complaining to the people who make the software that writes the original PDF file.
If you can share a file that causes this problem, we might be able to dig around in the file a bit to figure out what's wrong (I cannot promise you anything, if it gets too time consuming, I would have to bail).
Thanks for your prompt response. I pressed CTRL and pressed the OK button and then I got this message; "Unterminated string". Unfortunately, because of some sensitive information, I am unable to share these files. Would this error message have anything to do with how they program their software? And is it safe to say that this wouldn't be an Adobe Acrobat issue more than it is the web based client software itself? The reason I ask is because the software providers keeps referring me to Adobe Acrobat as they say it is an issue with Adobe. Thanks.
Of course they do, it makes their lives easier because you have to run around and proof them wrong
Based on that message, I would assume that the file is corrupt. A PDF file can become corrupt either at the time it is created (in which case the PDF generator would be to blame), or it can get corrupted along the way by software that is trying to modify the PDF file. There is a very small chance that the file is actually OK, and the problem is Acrobat, and something in Acrobat triggers this error message. Based on my experience, in most cases, it's the PDF file that is to blame. Unfortunately, without the file it's impossible to say. Because you cannot share the file publicly, I would suggest that you work with somebody (which unfortunately means paying somebody) after signing an NDA, this way you can determine exactly what's wrong.
One thing you can already do is to find out what software created the PDF file: Bring up the document properties dialog and look for the "Application" and "PDF Producer" information on the "Description" tab. This should list what application exactly created the document. Sometimes both fields are empty, which kind of tells you how confident the makers of the software were about the quality of PDF produced...
You are correct, the Application and PDF Producer are both blank! Thank you again! I now have more information to give them.