We are using the Concatenate function to merge PDFs and it does seem to work on certain PDFs with bookmarks. The code doesn’t throw any error/ exception. It just hangs on the line of code where the concatenate is called. It seem to work perfectly on certain other files with bookmarks. The files are not large - 2 or 3 pages.
I ran the same files through Pdfsam and it was able to merge and keep the bookmarks without any issues.
Has anyone else encountered such issue and do you have a fix for it?