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Old 04-20-2018, 12:59 PM   #1
avidreadr
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Calibre 3.22.1 Crashes

calibre, version 3.22.1
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 227, in do_launch
File "site-packages\calibre\utils\ipc\launch.py", line 228, in __call__
File "subprocess.py", line 711, in __init__
File "subprocess.py", line 959, in _execute_child
WindowsError: [Error 2] The system cannot find the file specified


calibre 3.22.1 embedded-python: True is64bit: False
Windows-8-6.2.9200-SP0 Windows ('32bit', 'WindowsPE')
32bit process running on 64bit windows
('Windows', '8', '6.2.9200')
Python 2.7.12+
Windows: ('8', '6.2.9200', 'SP0', u'Multiprocessor Free')
Interface language: None
Traceback (most recent call last):
File "site-packages\calibre\gui2\actions\view.py", line 106, in view_format_by_id
File "site-packages\calibre\gui2\actions\view.py", line 155, in _view_file
File "site-packages\calibre\gui2\actions\view.py", line 125, in _launch_viewer
File "site-packages\calibre\gui2\jobs.py", line 284, in launch_gui_app
File "site-packages\calibre\utils\ipc\server.py", line 245, in run_job
File "site-packages\calibre\utils\ipc\server.py", line 218, in launch_worker
CriticalError: Failed to launch worker process:
Traceback (most recent call last):
File "site-packages\calibre\utils\ipc\server.py", line 227, in do_launch
File "site-packages\calibre\utils\ipc\launch.py", line 228, in __call__
File "subprocess.py", line 711, in __init__
File "subprocess.py", line 959, in _execute_child
WindowsError: [Error 2] The system cannot find the file specified
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Old 04-20-2018, 01:00 PM   #2
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this is error i amgetting av is disabled
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Old 04-20-2018, 06:18 PM   #3
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@avidreadr - rather that tacking your posts on the back of a random ancient thread, create a new thread as needed. Read the Guidelines that you signed up to, there's a link at the bottom most pages.

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Old 04-20-2018, 08:34 PM   #4
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According to this thread Kovid's answer is

Quote:
Originally Posted by kovidgoyal View Post
Your antivirus is blocking the worker process calibre uses to show file dialogs. Most likely it has quarantined some files from the calibre installation directory.
This thread has a similar diagnosis and the same outcome.
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Old 04-21-2018, 07:46 AM   #5
avidreadr
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Device: calibre 3.22.1
calibre, version 3.22.1
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 227, in do_launch
File "site-packages\calibre\utils\ipc\launch.py", line 228, in __call__
File "subprocess.py", line 711, in __init__
File "subprocess.py", line 959, in _execute_child
WindowsError: [Error 2] The system cannot find the file specified


calibre 3.22.1 embedded-python: True is64bit: False
Windows-8-6.2.9200-SP0 Windows ('32bit', 'WindowsPE')
32bit process running on 64bit windows
('Windows', '8', '6.2.9200')
Python 2.7.12+
Windows: ('8', '6.2.9200', 'SP0', u'Multiprocessor Free')
Interface language: None
Traceback (most recent call last):
File "site-packages\calibre\gui2\actions\view.py", line 106, in view_format_by_id
File "site-packages\calibre\gui2\actions\view.py", line 155, in _view_file
File "site-packages\calibre\gui2\actions\view.py", line 125, in _launch_viewer
File "site-packages\calibre\gui2\jobs.py", line 284, in launch_gui_app
File "site-packages\calibre\utils\ipc\server.py", line 245, in run_job
File "site-packages\calibre\utils\ipc\server.py", line 218, in launch_worker
CriticalError: Failed to launch worker process:
Traceback (most recent call last):
File "site-packages\calibre\utils\ipc\server.py", line 227, in do_launch
File "site-packages\calibre\utils\ipc\launch.py", line 228, in __call__
File "subprocess.py", line 711, in __init__
File "subprocess.py", line 959, in _execute_child
WindowsError: [Error 2] The system cannot find the file specified

i am using calibre since last 1 user find it very user friendly and great
but now a day i am getting this error my av is disable
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Old 04-21-2018, 08:11 AM   #6
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Quote:
Originally Posted by avidreadr View Post
i am using calibre since last 1 user find it very user friendly and great but now a day i am getting this error my av is disable
Did you follow Kovid's advice from the 2nd thread I pointed you to? Here it is specifically.

Quote:
Originally Posted by kovidgoyal View Post
That indicates a corrupted install. Most likely an antivirus program quarantined the calibre worker process executable. Uninstal, and then re-install and you should be fine.
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Old 04-21-2018, 10:06 AM   #7
avidreadr
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calibre uninstalled and reinstall same error

anti virus is disable
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Old 04-21-2018, 11:15 AM   #8
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Quote:
Originally Posted by avidreadr View Post
calibre uninstalled and reinstall same error

anti virus is disable
  • Delete calibre-3.22.1.msi
  • Uninstall calibre
  • Make sure antivirus and anti-spyware is disabled
  • If you use sync software make sure sync software like dropbox is paused or turned off.
  • Download new calibre from https://calibre-ebook.com/download
  • install calibre
Good luck.
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Old 04-21-2018, 12:17 PM   #9
avidreadr
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Device: calibre 3.22.1
deleted calibre 3.22.1msi
uninstalled calbre
anti virus is disabled
no sync software
downloaded calibre from calibre-ebook site 64 bit version through ie 9 as google is not allowing to download but error message
calibre, version 3.22.1
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 227, in do_launch
File "site-packages\calibre\utils\ipc\launch.py", line 228, in __call__
File "subprocess.py", line 711, in __init__
File "subprocess.py", line 959, in _execute_child
WindowsError: [Error 2] The system cannot find the file specified


calibre 3.22.1 [64bit] embedded-python: True is64bit: True
Windows-8-6.2.9200-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '8', '6.2.9200')
Python 2.7.12+
Windows: ('8', '6.2.9200', 'SP0', u'Multiprocessor Free')
Interface language: None
Traceback (most recent call last):
File "site-packages\calibre\gui2\actions\view.py", line 106, in view_format_by_id
File "site-packages\calibre\gui2\actions\view.py", line 155, in _view_file
File "site-packages\calibre\gui2\actions\view.py", line 125, in _launch_viewer
File "site-packages\calibre\gui2\jobs.py", line 284, in launch_gui_app
File "site-packages\calibre\utils\ipc\server.py", line 245, in run_job
File "site-packages\calibre\utils\ipc\server.py", line 218, in launch_worker
CriticalError: Failed to launch worker process:
Traceback (most recent call last):
File "site-packages\calibre\utils\ipc\server.py", line 227, in do_launch
File "site-packages\calibre\utils\ipc\launch.py", line 228, in __call__
File "subprocess.py", line 711, in __init__
File "subprocess.py", line 959, in _execute_child
WindowsError: [Error 2] The system cannot find the file specified

really helpme please
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Old 04-21-2018, 12:26 PM   #10
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Quote:
Originally Posted by avidreadr View Post
deleted calibre 3.22.1msi
uninstalled calbre
anti virus is disabled
no sync software
downloaded calibre from calibre-ebook site 64 bit version through ie 9 as google is not allowing to download but error message
calibre, version 3.22.1
ERROR: Unhandled exception: <b>CriticalError</b>:Failed to launch worker process:
<snip>
WindowsError: [Error 2] The system cannot find the file specified

really helpme please
Please don't keep posting the exact same error message. We got it.

This is a problem with your system. The usual suspects have been mentioned. You just have to wait for someone to have another idea

You might run a Malware scan.
Something is blocking or deleting a piece that Calibre needs to launch a Worker task
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Old 04-21-2018, 06:33 PM   #11
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@avidreadr - Try running in Windows Safe mode. Poorly written shell extensions, utilities loaded at startup, and drivers can cause these sort of problems. Box pedlars install programs you don't need to get the kickbacks from the software suppliers, who then do automatic silent updates which breaks programs you do need.

See Calibre User Manual->Frequently Asked Questions->Miscellaneous, in particular the calibre is not starting on Windows? and calibre freezes/crashes occasionally? items.

BR
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Old 04-21-2018, 09:41 PM   #12
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Quote:
Originally Posted by avidreadr View Post
deleted calibre 3.22.1msi
uninstalled calbre
anti virus is disabled
no sync software
downloaded calibre from calibre-ebook site 64 bit version through ie 9 as google is not allowing to download but error message
calibre, version 3.22.1
ERROR: Unhandled exception: <b>CriticalError</b>:Failed to launch worker process:
If Google Chrome is not allowing you to download the MSI file from calibre's site you may have bigger issues on your machine. Running a complete malware scan of your machine as theducks suggests is a good place to start.

Review the various FAQ entries that BetterRed pointed you to.

FAQ MiscellaneousIf after following the steps in the above FAQ entries you still have an issue you can follow BetterRed's advice, boot into Windows safe mode as part of your re-install.
  • Delete calibre-3.22.1.msi
  • Uninstall calibre
  • Reboot your computer, Start up in Window's Safe Mode
  • Make sure all antivirus and anti-spyware are disabled
  • Download new calibre from https://calibre-ebook.com/download
  • install calibre
Which anti-virus software are you using? Don't forget Window's Defender is an antivirus program too. The error you keep getting indicates that something on your system is wrong and it is not allowing calibre to install completely.

Good Luck.

Last edited by DoctorOhh; 04-21-2018 at 09:43 PM.
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Old 04-21-2018, 10:14 PM   #13
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Quote:
Originally Posted by avidreadr View Post
deleted calibre 3.22.1msi
uninstalled calbre
anti virus is disabled
no sync software
downloaded calibre from calibre-ebook site 64 bit version through ie 9 as google is not allowing to download but error message
I would suggest the first step is finding out why Chrome is not allowing you to download calibre. Chrome 66.0.3359.117 on my Windows 10 x64 laptop had no issues. I also tried Chrome on three virtual machines (Windows 7 x64 and x86 and a Mac OSX 10.13.4) and Chrome had no issues downloading the calibre installer. I also tried Firefox, IE, Edge and Safari and again no issues.

What AV are you using? Have you scanned your computer with Malwarebytes or similar malware scanner? What version of Windows are you running? If IE 9 is the latest version supported for your version of Windows, it's long past time to say goodbye to Vista.
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Old 04-22-2018, 12:24 AM   #14
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AV USED IS NPAV
CHROME IS UPDATED
SINCE THEN I USED TO UPDATE OF CALIBRE THR IE THERE WAS NO ISSUE
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Old 04-22-2018, 06:40 AM   #15
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window defender was culprit disable

now working properly

thanks a lot guy

u folks solved problem

great


enjoy being with you people
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