Calibre can't start due to single instance locking failure

[Ed Crowe]

Traceback (most recent call last):
  File "site-packages\calibre\gui2\main.py", line 530, in main
  File "site-packages\calibre\utils\lock.py", line 196, in singleinstance
  File "site-packages\calibre\utils\lock.py", line 130, in create_single_instance_mutex
  File "site-packages\calibre\constants.py", line 310, in get_windows_username
WindowsError: [Error 8] Not enough storage is available to process this command

Windows 7 pro fully updated

This happens randomly, since the last 5 or 6 updates. Now on 3.34
Clears for a while on uninstalling and reinstalling Calibre

Ed

[Kovid Goyal (kovid)]

That looks like a disk space issue, check if the system drive (usually
c:) is low on disk space.

 status invalid

[Ed Crowe (edcrowe)]

Kovid,

Thanks,
C: drive has only 8.5 GB free out of 100 GB
The Calibre Library is on D:
The Library takes 230 MB.
D has about 160 GB free out of 360 GB.

I'll try to get some more free space on C:
The page file is 20 GB and the hibernate file is 15 GB.
I'll could turn off Hibernation, and see what happens.
Best regards, Ed

[Ed Crowe (edcrowe)]

Kovid,
I reduced the size of the paging file by 4 GB to 12 GB.

Same problem, same error message.

If I open windows "Programs and Features" and click "Repair" then Calibre starts successfully.
But I guess that will not persist.
I'll post again if it crashes, or in a week if it does not crash.

I should mention that the crash is a new thing,
I have run Calibre OK for almost three years without a problem on this PC

Best regards,
Ed

[Ed Crowe (edcrowe)]

THIS IS STILL A CRITICAL BUG.
It prevents Calibre from starting.
What can I do to give you more information?
I have updated to latest Calibre, but this bug still occurs.
Ed

[Ed Crowe (edcrowe)]

How is this an INVALID bug?
It still prevents Calibre from running, whether it is INVALID or not.

[Kovid Goyal (kovid)]

Because it is not a bug in calibre, it is windows telling calibre that I
cannot tell you what the current users username is because I dont have
enough space. There is nothing calibre can do about that.