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			 Interested in the matter 
			
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				PDF to..., with Calibre 4.2
			 
			
			
			PDF conversion to epub or fb2, does not work, independent of the source file or / and the settings used in the conversion. 
		
	
		
		
			The funny thing is that opening the PDF with the Caliber viewer, it presents it without problems and in a few seconds. I attach a PDF and copy of the details of the task, after stopping it after thirty minutes. With Windows 10  | 
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			 Resident Curmudgeon 
			
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		#3 | 
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			 creator of calibre 
			
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			WOrks for me on linux, dont have access to a windows computer right now to check. Can you run the conversion from a command prompt using ebook-convert
		 
		
	
		
		
		
		
		
		
		
		
		
		
	
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			 creator of calibre 
			
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			Worked on my windows 10 machine as well
		 
		
	
		
		
		
		
		
		
		
		
		
		
	
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		#5 | 
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			 null operator (he/him) 
			
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			Convert to ePub took 3 seconds here with default settings 
		
	
		
		
			$20 please ![]() BR  | 
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		#6 | 
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			 Interested in the matter 
			
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			Thank you, Kovid and BR. 
		
	
		
		
		
		
		
		
		
		
		
		
	
	Your information has encouraged me to start a trial and error list. And I found the culprit! In the Search and Replace section, I had: search for "\s" and replace with "normal space" (with the intention of eliminating break-spaces etc). Until last month it had done his job correctly, but now he leaves the converter hanging.  | 
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		#7 | 
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			 creator of calibre 
			
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			As I recall \s only matches normal space, newline, tab etc. Though why it should cause the other PDf cleanup regular expression to hang I dont kow.
		 
		
	
		
		
		
		
		
		
		
		
		
		
	
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		#8 | 
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			 Interested in the matter 
			
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		#9 | 
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			 creator of calibre 
			
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			This is fixed by: https://github.com/kovidgoyal/calibr...7b3df701a5f688
		 
		
	
		
		
		
		
		
		
		
		
		
		
	
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		#10 | 
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			 Interested in the matter 
			
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			Wow! Awesome. 
		
	
		
		
		
		
		
		
		
		
		
		
	
	 
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			 Junior Member 
			
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		#12 | 
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			 Well trained by Cats 
			
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