search for: launch_worker

...ollowing error: Exception in thread Thread-4: Traceback (most recent call last): File "threading.py", line 530, in __bootstrap_inner File "site-packages\calibre\utils\ipc\server.py", line 221, in run File "site-packages\calibre\utils\ipc\server.py", line 139, in launch_worker CriticalError: Failed to launch worker process: Traceback (most recent call last): File "site-packages\calibre\utils\ipc\server.py", line 149, in do_launch File "multiprocessing\connection.py", line 121, in accept File "multiprocessing\connection.py", line 373, i...