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Old 07-05-2013, 06:32 PM   #16
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Quote:
Originally Posted by BobC View Post
When you get the error what do you see if you use a file manager to examine the mounted USB drive(s).

I have a long-standing problem where the USB connection is lost when Calibre tries to synch with the Glo - the drive is still showing as mounted under Windows but is empty (Volume type: unknown, Staus : unreadable) and wonder if your problem is the same as mine.
I had that issue with my original Kobo until I updated the AMD USB filter driver. That seems to have fixed the problem under Windows XP. After wiping and updating to Windows 7, the problem has not shown up again.
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Old 07-05-2013, 09:40 PM   #17
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Quote:
Originally Posted by DNSB View Post
I had that issue with my original Kobo until I updated the AMD USB filter driver. That seems to have fixed the problem under Windows XP. After wiping and updating to Windows 7, the problem has not shown up again.
I'm running WinXP and I'm going to try updating the AMD USB filter driver as you said. Hopefully that will stop this issue.

Edit: Actually I can't find the driver for my particular motherboard and not sure if the driver for a similar but not identical motherboard will work or not. My motherboard is Asus M4A78 PLUS.

Last edited by Ripplinger; 07-05-2013 at 09:53 PM.
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Old 07-06-2013, 02:22 PM   #18
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Quote:
Originally Posted by DNSB View Post
I had that issue with my original Kobo until I updated the AMD USB filter driver. That seems to have fixed the problem under Windows XP. After wiping and updating to Windows 7, the problem has not shown up again.
Like Riplinger I can't find an updated driver for my MoBo. The problem only started when the Glo updated from 2.40 - since then I hit the issue with varying degrees of regularity.

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Old 07-07-2013, 03:26 AM   #19
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Quote:
Originally Posted by Ripplinger View Post
I'm running WinXP and I'm going to try updating the AMD USB filter driver as you said. Hopefully that will stop this issue.

Edit: Actually I can't find the driver for my particular motherboard and not sure if the driver for a similar but not identical motherboard will work or not. My motherboard is Asus M4A78 PLUS.
The driver I used from downloaded from a third party site. It's dated from 2011 so a bit old by now. Near as I can tell from some old notes about the issue, it was dated 2011-Jul-14, version 2.0.1.137. From what I read on AMD's site, it worked with quite a few chipsets. The readme.rtf file in the link below gives more information on what chipsets it works with.

ftp://abook.dk/ADesk%20Drivers/nt-a3550/AMD/USBFilter/

Good luck!

David
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Old 07-07-2013, 02:18 PM   #20
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Okay. will get ahold of a Mac with Calibre tomorrow. Lemme check first if it'll do something good. Thanks Guys, I will update you as soon as possible.
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Old 07-07-2013, 02:37 PM   #21
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I will admit that for items like chipset drivers, I normally go with those available from the chipset manufacturer; so for the AMD 770 / SB770 I'd go to http://support.amd.com/us/gpudownloa...d_windows.aspx
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Old 07-07-2013, 06:15 PM   #22
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Quote:
Originally Posted by DNSB View Post
The driver I used from downloaded from a third party site. It's dated from 2011 so a bit old by now. Near as I can tell from some old notes about the issue, it was dated 2011-Jul-14, version 2.0.1.137. From what I read on AMD's site, it worked with quite a few chipsets. The readme.rtf file in the link below gives more information on what chipsets it works with.

ftp://abook.dk/ADesk%20Drivers/nt-a3550/AMD/USBFilter/

Good luck!

David
Got those drivers installed, hopefully it will stop the errors communicating with the Glo.

It's odd that this never happens with the Sony 350s, only with the Glo.
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Old 07-11-2013, 07:35 PM   #23
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Well the different drivers didn't help at all. Plugged in the Glo and went to remove a book, first thing I did once connected and got:

Quote:
calibre, version 0.9.38
ERROR: Error: Error communicating with device

unable to open database file

Traceback (most recent call last):
File "site-packages\calibre\gui2\device.py", line 85, in run
File "site-packages\calibre\gui2\device.py", line 581, in _delete_books
File "site-packages\calibre\devices\kobo\driver.py", line 453, in delete_books
File "site-packages\calibre\devices\kobo\driver.py", line 1851, in delete_via_sql
File "site-packages\calibre\devices\kobo\driver.py", line 365, in delete_via_sql
OperationalError: unable to open database file
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Old 07-11-2013, 08:49 PM   #24
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Have you tried to reboot your computer? It may sound silly but a reboot may solve your problem. I use debian linux on my computer and sometimes the operating system does not recognize the kobo. When this happens...calibre won't sync.
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Old 07-11-2013, 08:57 PM   #25
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Rebooting the PC doesn't change anything. The next time I restart Calibre and plug in the Glo, it may not happen even though I don't reset the device and start with a new database. I may be able to add a few books next time, and then if I want to add a few more or delete something within that same session, the error will then pop up.

Actually now that I think about it, doing multiple transfers or deletes during the same session will just about always trigger the error.
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Old 07-11-2013, 11:03 PM   #26
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That error is different. "OperationalError: unable to open database file" makes me think it is with the connection to the device. It sounds like it is being dropped or changed to readonly.

Something else to try is to see if Windows can still see the device and write to it between each calibre action. So, after calibre finishes its initial sync, check Windows can see it. Then try sending a book or deleting one and check again. And if you get an error like above, check again.

The other thing to try is another PC. Any chance of that?
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Old 07-12-2013, 05:41 AM   #27
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It sounds a bit similar to the problem I have with my Aura. It seems to drop off the USB bus randomly. It connects fine, Calibre sees it, and I can send books to it. And then when I try to send another, Calibre errors out with 'The system can't find the file specified'.

At that point Windows (XP Pro 32bit) has lost the drive as well; the drive letter is still there, but I can't do anything with it anymore. Ejecting the device and reconnecting it fixes it most of the time. For a while.

The funny thing is that it never, as yet, has damaged either the file system or the Kobo database (both chkdsk and the Kobo Utilities plugin give it a clean bill of health afterwards).

Changing the USB port or cable doesn't make a difference, and neither has a factory reset. I haven't tried another PC yet.
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Old 07-12-2013, 07:11 AM   #28
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I tried swapping a different cable (but I still want to dig out the one that came with the Kobo, and I can't find the box atm). I first tried to send a book to the reader to copy over the one there and got this message:
Quote:
calibre, version 0.9.38
ERROR: Error: Error communicating with device

(2, 'GetDiskFreeSpace', 'The system cannot find the file specified.')

Traceback (most recent call last):
File "site-packages\calibre\gui2\device.py", line 85, in run
File "site-packages\calibre\gui2\device.py", line 557, in _upload_books
File "site-packages\calibre\devices\kobo\driver.py", line 1812, in upload_books
File "site-packages\calibre\devices\usbms\driver.py", line 256, in upload_books
File "site-packages\calibre\devices\usbms\device.py", line 986, in _sanity_check
File "site-packages\calibre\devices\usbms\device.py", line 177, in free_space
File "site-packages\calibre\devices\usbms\device.py", line 134, in _windows_space
error: (2, 'GetDiskFreeSpace', 'The system cannot find the file specified.')
Then I tried to delete the book first from the Glo, and then got this error:
Quote:
calibre, version 0.9.38
ERROR: Error: Error communicating with device

unable to open database file

Traceback (most recent call last):
File "site-packages\calibre\gui2\device.py", line 85, in run
File "site-packages\calibre\gui2\device.py", line 581, in _delete_books
File "site-packages\calibre\devices\kobo\driver.py", line 453, in delete_books
File "site-packages\calibre\devices\kobo\driver.py", line 1851, in delete_via_sql
File "site-packages\calibre\devices\kobo\driver.py", line 365, in delete_via_sql
OperationalError: unable to open database file
As mbovenka said, once the first error happens, then I can no longer access the files on the Glo through explorer. The drive letter for the Glo is still shown and usually all the directories, but they're all blank and you can't see any files in the directories.

I have another PC I can try it on (just give me a day or 2, need to update Calibre on that one), but I really don't think there will be any difference. In over 2.5 years I don't have any issues like this with the Sony 350s on this PC with the same USB cable and same versions of Calibre.
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Old 07-12-2013, 09:44 AM   #29
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Quote:
Originally Posted by Ripplinger View Post
As mbovenka said, once the first error happens, then I can no longer access the files on the Glo through explorer. The drive letter for the Glo is still shown and usually all the directories, but they're all blank and you can't see any files in the directories.
Yep, that error is the one I get. Looks like a Kobo firmware issue then, unless it's common hardware between the Glo and the Aura (USB controller?). Like you, I have had no issues with that PC and cable with other readers (2 Kindle DXes and a Bebook One) at all.
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Old 07-12-2013, 11:41 AM   #30
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@Ripplinger and mbovenka: How big is the database file on the device? Similar reports in the past have suggested that writing small files to the device was OK. But, when larger files were changed, the connection drops. Unfortunately, the database tends to be the largest file on the device. And it can be updated when calibre first sees the device. Setting metadata management to manual on the Sending books to devices page of the preferences might solve this. But then shelves and series info won't get updated.

Also, from memory, the previous reports have always been XP machines. I don't know why. It could be older machines or less efficient drivers. Or maybe some weird interaction between the drivers and the device. But, I am also sure that moving to another PC fixed the problem. That is probably not a practical solution, unless you are looking for an excuse to upgrade
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