[steve2112]

Hi

I'm having similar problem - suddenly Calibre isn't allowing me to add new books to the library. I switched off my anti-virus but no change. I've rebooted - still the same. I've updated to latest Calibre version and still the same.

I get the following error message:

calibre, version 2.35.0
ERROR: Cannot add books: Failed to add any books, click "Show details" for more information.

Failed to start worker process
Traceback (most recent call last):
File "site-packages\calibre\utils\ipc\pool.py", line 197, in start_worker
File "site-packages\calibre\utils\ipc\pool.py", line 185, in create_worker
File "site-packages\calibre\utils\ipc\pool.py", line 71, in start_worker
File "site-packages\calibre\utils\ipc\simple_worker.py", line 160, in start_pipe_worker
File "subprocess.py", line 710, in __init__
File "subprocess.py", line 958, in _execute_child
WindowsError: [Error 5] Access is denied

UPDATE:
Now realise that I can't actually access any of the existing books in the library - new error code:

calibre, version 2.35.0
ERROR: Unhandled exception: <b>CriticalError</b>:Failed to launch worker process:
Traceback (most recent call last):
File "site-packages\calibre\utils\ipc\server.py", line 196, in do_launch
File "site-packages\calibre\utils\ipc\launch.py", line 224, in __call__
File "subprocess.py", line 710, in __init__
File "subprocess.py", line 958, in _execute_child
WindowsError: [Error 5] Access is denied


calibre 2.35 isfrozen: True is64bit: False
Windows-7-6.1.7601-SP1 Windows ('32bit', 'WindowsPE')
32bit process running on 64bit windows
('Windows', '7', '6.1.7601')
Python 2.7.9
Windows: ('7', '6.1.7601', 'SP1', 'Multiprocessor Free')
Successfully initialized third party plugins: MobiUnpack - The Plugin
Traceback (most recent call last):
File "site-packages\calibre\gui2\actions\view.py", line 234, in view_triggered
File "site-packages\calibre\gui2\actions\view.py", line 310, in _view_books
File "site-packages\calibre\gui2\actions\view.py", line 269, in _view_calibre_books
File "site-packages\calibre\gui2\actions\view.py", line 103, in view_format_by_id
File "site-packages\calibre\gui2\actions\view.py", line 152, in _view_file
File "site-packages\calibre\gui2\actions\view.py", line 122, in _launch_viewer
File "site-packages\calibre\gui2\jobs.py", line 261, in launch_gui_app
File "site-packages\calibre\utils\ipc\server.py", line 214, in run_job
File "site-packages\calibre\utils\ipc\server.py", line 187, in launch_worker
CriticalError: Failed to launch worker process:
Traceback (most recent call last):
File "site-packages\calibre\utils\ipc\server.py", line 196, in do_launch
File "site-packages\calibre\utils\ipc\launch.py", line 224, in __call__
File "subprocess.py", line 710, in __init__
File "subprocess.py", line 958, in _execute_child
WindowsError: [Error 5] Access is denied


Any help appreciated.

Many thanks

Steve