Find and replace error message?

[Rae5FB1]

I have multiple 500+ page PDFs that require the find/replace function for every page. When I begin, it finds and replaces the first few instances of the word, then I get an error message that says "Unable to highlight text across multiple text boxes." Any ideas?? 

[try67]

Go back to the original file format, make the changes there and then create a new PDF file.

[Rae5FB1]

I'm not sure I understand. I can't manually find/replace as that is over 8,000 corrections. I need this function to work! What do I correct on the initial files in order for find/replace to work? Any ideas why it is not working? I have Acrobat standard and I'm on a PC. My boss has Acrobat Pro and is on a Mac, and does not run into this issue. Do I need to upgrade to Pro? 

[try67]

I didn't suggest you do it manually, but doing it in Acrobat is not the solution, either. It has not Search & Replace All command, so anyway you'll have to click the Replace button 8000+ times to do it, and it's very likely something will go wrong along the way. PDF files were simply not meant to be edited in such an extensive way.