Problem moving books to a tablet

[Rexthewolf]

Ive been trying to move some more books from my Calibre Library on a PC to a storage card within an android tablet (Android 7) or even to the main memory of the tablet, but I keep getting error messages as below: I dont know what any of this means but so far I have upgraded Calibre to the latest version, tried several different data cables and reset Calibre setting to default. I should say that I have been using Calibre for many years without trouble and think I know what I'm doing?? I have approx 150 books in my Calibre library and around 50 on my tablet, so I have done this in the past.

Im using Windows 10 PC and can read the contents of the card and the tablet using the same cable via the Win 10 explorer - no problem.

Any help much appreciated.

calibre, version 5.44.0
ERROR: Error: Error communicating with device

C:\r\src\src\calibre\devices\mtp\windows\content_e numeration.cpp:336:Failed to EnumObjects() of folder from device:[hr=0x80070490 wCode=0] Element not found.: o240B

Traceback (most recent call last):
File "calibre\gui2\device.py", line 87, in run
File "calibre\gui2\device.py", line 548, in _books
File "calibre\devices\mtp\driver.py", line 219, in books
File "calibre\devices\mtp\driver.py", line 191, in get_driveinfo
File "calibre\devices\mtp\windows\driver.py", line 271, in filesystem_cache
wpd.WPDError: C:\r\src\src\calibre\devices\mtp\windows\content_e numeration.cpp:336:Failed to EnumObjects() of folder from device:[hr=0x80070490 wCode=0] Element not found.: o240B

[georgemk]

Hi Rexthewolf
the answer is given in this thread https://www.mobileread.com/forums/sh...d.php?t=347266

[Quoth]

Connect a local folder/directory created for this to Calibre as a device. Send the books to it.

Put the storage card in PC (via USB adaptor if no card reader, they are cheap). Use the file manager (explorer) to copy your local folder/directory contents to a folder called books on the card. This WON'T work if the card is encrypted as built-in storage rather than removable portable storage. In that case plug in the tablet with card in it and ONLY have the file manager (Explorer) open (close Calibre, Media players etc) and copy the files.

The issue is Android MTP.

[Rexthewolf]

Originally Posted by Quoth

Connect a local folder/directory created for this to Calibre as a device. Send the books to it.

Put the storage card in PC (via USB adaptor if no card reader, they are cheap). Use the file manager (explorer) to copy your local folder/directory contents to a folder called books on the card. This WON'T work if the card is encrypted as built-in storage rather than removable portable storage. In that case plug in the tablet with card in it and ONLY have the file manager (Explorer) open (close Calibre, Media players etc) and copy the files.

The issue is Android MTP.

Thanks for the info, I have also read the post from Georgemk (thanks also) I may have deleted the original folder on the device for receiving books in my efforts to send them direct to the card. I have decided now to forego the card. Can I simply create a folder on the android device, call it EBooks, and instruct Calibre to send new books to the Ebook folder

Many thanks

[gbm]

Look at Calibre Sync for Android it might be what you want.

https://www.mobileread.com/forums/sh...d.php?t=345380

bernie

Originally Posted by Rexthewolf

Thanks for the info, I have also read the post from Georgemk (thanks also) I may have deleted the original folder on the device for receiving books in my efforts to send them direct to the card. I have decided now to forego the card. Can I simply create a folder on the android device, call it EBooks, and instruct Calibre to send new books to the Ebook folder

Many thanks

[Rexthewolf]

Have now removed Card A from the android tablet and tried to move 1 book to the device and got the following Failure message: Any other suggestions?

C:\r\src\src\calibre\devices\mtp\windows\content_e numeration.cpp:336:Failed to EnumObjects() of folder from device:[hr=0x8007000d wCode=0] The data is invalid.: o240D

Traceback (most recent call last):
File "calibre\gui2\device.py", line 87, in run
File "calibre\gui2\device.py", line 628, in _upload_books
File "calibre\devices\mtp\driver.py", line 412, in upload_books
File "calibre\devices\mtp\driver.py", line 384, in prefix_for_location
File "calibre\devices\mtp\windows\driver.py", line 271, in filesystem_cache
wpd.WPDError: C:\r\src\src\calibre\devices\mtp\windows\content_e numeration.cpp:336:Failed to EnumObjects() of folder from device:[hr=0x8007000d wCode=0] The data is invalid.: o240D

[tlwright]

I have 12k books on a 128GB SD card in a tablet running Android 7. I started having similar issues when my card got corrupted.

Try reformatting the SD card in the tablet, then redoing the device configuration in case you have a specific filename template. Make sure nothing else is trying to access the SD card on the tablet and do not disturb is set. I was having issues with notifs interrupting transfers.

[Rexthewolf]

Originally Posted by tlwright

I have 12k books on a 128GB SD card in a tablet running Android 7. I started having similar issues when my card got corrupted.

Try reformatting the SD card in the tablet, then redoing the device configuration in case you have a specific filename template. Make sure nothing else is trying to access the SD card on the tablet and do not disturb is set. I was having issues with notifs interrupting transfers.

Thanks for the suggestion, but frankly I don't believe that the SD card is the problem. As per my last post, I had removed the card and re-configured so as the storage was back on the device memory of my tablet. This resulted in another error message - see my last post. Unfortunately I do not understand the meaning of the error messages. Unless I hear otherwise the only solution that I can think of is to save all of my books (about 150) to my pc hard drive, completely uninstall Calibre and try to reinstall again.

Again thanks for your help

[gbm]

Use the wireless solution I suggested in post #5.


bernie

Originally Posted by Rexthewolf

Thanks for the suggestion, but frankly I don't believe that the SD card is the problem. As per my last post, I had removed the card and re-configured so as the storage was back on the device memory of my tablet. This resulted in another error message - see my last post. Unfortunately I do not understand the meaning of the error messages. Unless I hear otherwise the only solution that I can think of is to save all of my books (about 150) to my pc hard drive, completely uninstall Calibre and try to reinstall again.

Again thanks for your help

[Quoth]

Calibre is unlikely to be the issue.

I have SD cards on Android 6 Phone, Android 8 eink Mars (32 G) and on Lenovo tablet Android 10 (128 G card) working with Calibre.

[Rexthewolf]

Originally Posted by Quoth

Calibre is unlikely to be the issue.

I have SD cards on Android 6 Phone, Android 8 eink Mars (32 G) and on Lenovo tablet Android 10 (128 G card) working with Calibre.

My Samsung 64 card worked too until recently and still works. I have about 50 books on this card but can only read my current book when I reinstall the card. The memory in the tablet is about 80% full that why I prefer to store books on the card. There are about 150 books in my Calibre Library which is in the Documents folder of my Win 10 PC. Is there any good reason why I shouldnt copy the contents of this folder to a usb stick, un-install Calibre, re-install a fresh copy and move all the books from the usb back into the newly created Calibre folder. My feeling is that it is a setting that has been changed (probably by me) that I can no longer find.
BTW I am reading the books on FBReader paid version BETA if thats relevant

Thanks for your interest

[davidfor]

Originally Posted by Rexthewolf

My Samsung 64 card worked too until recently and still works. I have about 50 books on this card but can only read my current book when I reinstall the card. The memory in the tablet is about 80% full that why I prefer to store books on the card. There are about 150 books in my Calibre Library which is in the Documents folder of my Win 10 PC. Is there any good reason why I shouldnt copy the contents of this folder to a usb stick, un-install Calibre, re-install a fresh copy and move all the books from the usb back into the newly created Calibre folder. My feeling is that it is a setting that has been changed (probably by me) that I can no longer find.

Yes, there is a good reason not to do that. Because it is unlikely to be calibre causing the problem. A better thing to do would be to go to another PC and try again. If it fails, then it is the device. If it doesn't fail, it is probably the first PC.

Looking at the error, that is saying that when calibre tries to access something on the tablet, it is failing. It seems to be the card in the tablet. Have you tried to use Windows to access the card when the tablet is connected? Have you tried removing the card and seeing if calibre can see the tablet? Have you tested the card directly in the computer or some other device? Maybe it is failing. Or try an other card in the tablet.

[Rexthewolf]

Originally Posted by davidfor

Yes, there is a good reason not to do that. Because it is unlikely to be calibre causing the problem. A better thing to do would be to go to another PC and try again. If it fails, then it is the device. If it doesn't fail, it is probably the first PC.

Looking at the error, that is saying that when calibre tries to access something on the tablet, it is failing. It seems to be the card in the tablet. Have you tried to use Windows to access the card when the tablet is connected? Have you tried removing the card and seeing if calibre can see the tablet? Have you tested the card directly in the computer or some other device? Maybe it is failing. Or try an other card in the tablet.

David
Thanks for the detailed reply. Im off on holiday tomorrow so may resort to a paper-backs for now.
Unfortunately I don't have another PC to try on. Are you thinking its a firewall problem - I hadn't considered that.
Calibre is NOT able to access either the built-in memory of the S2 tablet or the card. When I try to access either, this is when the error is thrown up. I can access both the tablet structure and see/access book files on the card. Its when I try to add a new book either to the main memory or the sd card that the problem arises. Furthermore I can still read books from the card - dont think I could do that if the card was corrupted??
I have a screen-shot from my PC but cant seem to attach it- will try again as an additional post

[chaley]

@Rexthewolf: sometimes these problems can be fixed by rebooting both the computer and the device. By reboot I mean turn the power all the way off (not put the device to sleep), wait 30 seconds or so, then turn the power on.

Reason: the MTP handlers in both devices can get confused. Rebooting resets them.

[Rexthewolf]

Originally Posted by chaley

@Rexthewolf: sometimes these problems can be fixed by rebooting both the computer and the device. By reboot I mean turn the power all the way off (not put the device to sleep), wait 30 seconds or so, then turn the power on.

Reason: the MTP handlers in both devices can get confused. Rebooting resets them.

Thanks but I have already done that a few times - will do it again anyway