|  11-11-2018, 04:08 PM | #1 | 
| Junior Member  Posts: 7 Karma: 10 Join Date: Nov 2018 Device: Paperwhite | 
				
				Calibre stopped Working
			 
			
			Hello, I have a little problem with calibre. I can not open any Books nor can i add any Book. I deinstalled Calibre, deleted the Config files and then reinstalled it (not using the old Bibliotek). But still same problem. When adding a Book i get this message: Failed to start worker process Traceback (most recent call last): File "site-packages\calibre\utils\ipc\pool.py", line 201, in start_worker File "site-packages\calibre\utils\ipc\pool.py", line 191, in create_worker File "site-packages\calibre\utils\ipc\__init__.py", line 22, in eintr_retry_call IOError: [Errno 22] Invalid argument I deactivated my Antivirus Program (G-data) but nothing changed. I hope someone can help! | 
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|  11-11-2018, 04:28 PM | #2 | 
| null operator (he/him)            Posts: 22,012 Karma: 30277294 Join Date: Mar 2012 Location: Sydney Australia Device: none | 
			
			See third and fourth item in Calibre FAQ:Miscellaneous here First thing to try is running calibre in safe mode, if that works you need to figure out what process is blocking calibre. BR | 
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