PDF Merge Data Files into Spreadsheet Crashing

Hi,

Maybe you meant clicking on "Edit" ---> selecting "Form Options" ---> then selecting "Merge Data Files into Spreadsheets" ?

This "Merge Data Files into Spreadsheets" menu option is not accessed through the "Prepare Form" tool add-on and it is independent from it.

As far as exporting to a CSV file using the method above, when you click on that option the dialogue box that will pop has a tip with a light bulb icon that says: "Data Files you add should be from the same form". So what I did first I tried to push to the limits my crappo computer and merged about 100 PDF  files in a single document (which took about roughly 2 minutes to optimize and verify signatures on documents etc.), Then used the "Merge Data Files into Spreadsheets" and it created  CSV file out of a 2900 pages long single PDF document with no crashes.

I also recreated your scenario adding  up to 324 pdf files using the method you are describing in your post and adding the files from different folders and directories in my compputer; then  merged for an export.

It ran in under 1 minute and 10 seconds without crashing.

I also had Acrobat DC with 4 documents opened through 4 different tabs, one of them a heavily edited Georeferenced map PDF file, two different browser opened at the same time, one of them with up to 14 different browsing windows opened simultaneously in the same broswer, Task Manager to monitor these processes, and a heavy download of a program running in the background that is performing an online installation in my computer (for about  an hour now , and is still has a long way to go as I type here).

NOTE: My system is a crappo eMachines El1352 series (with EoL support from the vendor) , it used to have Win7 64bit and I forced an upgrade to Windows 10 on top of Windows 7 (not a clean install) with the following hardware specs: two different generic 4GB RAM sticks (taken from old unused computers) which  adds up to 8GB of unganged RAM, with an AMD Sempron 145 processor (2.8GHz) with very old SATA hard drives and a disconnected DVD-ROM.

So my recommendation would be, did you try to upgrade your Acrobat to the latest version first?

Can you confirm if before you perform the merging that the files that you are adding are saved locally in a directory of the hard drive of that computer and not in a shared or TEMP folder,  and that such files are not being opened simultaneously by different users ,( if shared on a network , for example) as you try to do the merge?