I am trying to combine multiple documents into one PDF using Adobe Acrobat Pro DC. I have tried using Create PDF as well as Combine Files and continue to get the same problem no matter what I try. I upload 4 documents, and when I click "combine", all files are changed to the first document that was chosen to be uploaded. So, I end up with one PDF with 4 of the same document instead of one PDF with 4 different documents.

This does not happen when I create a portfolio, but a portfolio cannot be used in my situation.

Thank you.

Getting reports from multiple users that when creating PDF's that the application crashes. THey have dealt with this issue but as work has picked up the issue needs to get resolved. Below are two sets of crash logs from Event Viewer:

Faulting application name: Acrobat.exe, version: 15.6.30306.25331, time stamp: 0x58dbf189
Faulting module name: unknown, version: 0.0.0.0, time stamp: 0x00000000
Exception code: 0xc000041d
Fault offset: 0x081c6c10
Faulting process id: 0x8688
Faulting application start time: 0x01d32c9f568ea265
Faulting application path: C:\Program Files (x86)\Adobe\Acrobat 2015\Acrobat\Acrobat.exe
Faulting module path: unknown
Report Id: 97362a04-9892-11e7-80fc-00155d011607
Faulting package full name:
Faulting package-relative application ID:

And

Faulting application name: Acrobat.exe, version: 15.6.30306.25331, time stamp: 0x58dbf189
Faulting module name: unknown, version: 0.0.0.0, time stamp: 0x00000000
Exception code: 0xc0000005
Fault offset: 0x081c6c10
Faulting process id: 0x8688
Faulting application start time: 0x01d32c9f568ea265
Faulting application path: C:\Program Files (x86)\Adobe\Acrobat 2015\Acrobat\Acrobat.exe
Faulting module path: unknown
Report Id: 95e3462b-9892-11e7-80fc-00155d011607
Faulting package full name:
Faulting package-relative application ID:

TIA

When you combine PDFs containing signatures they are saved as a portfolio. When sending the PDF file it is not accessible within the email document itself nor directly from the downloaded tab. All you see is a giant "Get Adobe Reader " icon. It's confusing since I have Adobe Reader...apparently you have to go to your download folder, right click on PDF file and select "open with" Adobe Reader in order to access it. But then you can only view combined files individually and not as a whole. This doesn't work for our use as three or more people need to access the file; we have thousands of files to handle, and this "glitch" is not compatible for seamless workflow. Previous version of Acrobat were much more user-friendly and allowed us flexibility of file management...this is no longer the case.

Problem: when combining multiple PDF files into one PDF, the result will be a variety of unprintable characters.
1) EACH individual PDF file appears fine (both on the screen and when printed). There are NO unprintable characters within the PDF.
2) CAN combine say 5 to 15 PDF files. All Fonts & characters appear fine (within the combined PDF). WILL also print OK. NO unprintable characters.
3) Now try to combine about 35-60 PDF files into ONE PDF file (NOT good). The COMBINED PDF will display on the SCREEN unprintable characters (€ = square box) on nearly every page!
Occurs RANDOMLY throughout many of the pages.
4) Fonts are Arial & Verdana. All Arial fonts show as embedded. Only the Verdana BOLD shows as not embedded (but it is a system font, so who cares).
5) REMEMBER: EVERY individual PDF will appear OK & Print OK.

SMALL numbers of combined PDF's will appear OK & Print OK. 

ONLY when many PDF's are combined does this problem appear!!

6) Happens to multiple people in our office environment. All running Windows 10 (with latest patches), and Acrobat Pro XI (11.0.20)
7) This is NOT a printer problem!!!!

 You can see all the square boxes on the SCREEN when viewing the "combined" PDF files.

8) Plenty of system memory. Plenty of Hard drive space.
9) CAN you FIX it! (say YES Adobe CAN!!!)

I purchased 3 licenses of Adobe Pro DC for use in my office. They were each installed on different computers(all windows 10 up to date, newest version of Microsoft office). We needed the software to convert word documents to PDF for upload to our new EMR system. All three worked great at first. Then all of a sudden two of the programs stopped recognizing docx. The word documents had not changed, were all in the same docx format! The third license was and still is working, unless I try to log in from a different computer to that license, then it won't recognize docx on the new computer. We have spent 5 plus hours of payroll time on the phone with Adobe tech support and still have no resolve, in fact we were told the problem was our word program. We have uninstalled and reinstalled both Adobe Pro DC and word. This has not resolved the issue. We have uninstalled, defragged, disc cleaned and reinstalled, issue still not resolved. At this point I just want a refund of the over 500 dollars in licenses I purchased!