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Hi, I tried that but get this: merger.append(filepath) File "C:\Users\*\AppData\Local\Programs\Python\Python37\lib\site-packages\pypdf\merger.py", line 146, in append self.merge(None, fileobj, bookmark, pages, import_bookmarks) File "C:\Users\*\AppData\Local\Programs\Python\Python37\lib\site-packages\pypdf\merger.py", line 116, in merge self._copy_bookmarks(fileobj.root_object["/Outlines"], bkmark, srcpages) File "C:\Users\*\AppData\Local\Programs\Python\Python37\lib\site-packages\pypdf\merger.py",...

[file1.pdf](https://github.com/claird/PyPDF4/files/5095032/file1.pdf) [file2.pdf](https://github.com/claird/PyPDF4/files/5095034/file2.pdf) Here's example files with blank pages. I get the same error with these.

Thanks, I tried and it worked as expected with those files. However, if I append the attached file, I get the following error: Traceback (most recent call last): File "pdflistmerge.py",...

Hi, as far as I can tell, that seems to be working exactly as expected. Thanks!