EDIT: I'm running Acrobat DC under Mac OS X 10.9.5.
I have filed a bug report for this, but I think other people might be interested in this discovery:
Steps to reproduce bug:
1. I am using Word 2011 on a file with a long name of "rgg1500_RGG_to_Installing_and_Configuring_the_Futaba_Radio_Control_System_on_the_Freefly_ALTA_6_and_8_1-15_2016-03-26.docx" (excluding quotation marks).
2. If I "Save As Adobe PDF", Adobe PDF Maker, reports "Links in this document could not be retained in the converted PDF" -- and the hyperlinks in the table of contents are indeed not retained -- nor are any hyperlinks that I have manually inserted to link to various document sections.
3. However if I then use the Finder to Duplicate the .docx file and rename the file to test.docx (a file with a very short file name), then the Save As Adobe PDF works fine and the hyperlinks are all retained in the resulting PDF.
How on earth does the length of the file name alter whether or not hyperlinks are retained? 
(Answer: I think the internal hyperlinks may include the file name and an Adobe programmer somewhere made an assumption about the maximum length of the file name in a data structure! 
)
However, it gets stranger: If I take the resulting test.pdf the PDF Maker created, and rename it *back* to the original long file name plus .pdf, the internal hyperlinks all still work.
And yes, if I change test.docx back to the long file name it was copied from, PDF Maker craps out again and fails to preserve the hyperlinks. So the problem is deterministic at least.
Regards
Andy
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