Kindle fire 7 9th Gen not showing in calibre

[stumped]

Originally Posted by SuzanneP

I’m getting an error that says
“Failed to get children from device”. What on earth does that mean?

I have never seen that but what I do with any strange error is put it into a Google search, and maybe add the words fire tablet, to help focus the search.

Ps a forum Search for that exact phrase has some hits, which suggest communication error, which suggests cable problem. Can you try a different cable and also try power cycling the tablet, or holding down the tablet power button for 40msecs, informing all messages, until it reboots. That does a soft reset.

[stumped]

Ps if it is calibre saying "failed to get children...." You can click "more details" in the error box and then you can copy and paste that into a post here ,which the calibre gurus may understand

[stumped]

Ps, again.
You could just abandon the whole USB method and use calibre companion. There is still a version in Amazon app store I think. That will talk to calibre over WiFi.
But test with the free demo version before buying, because there is no support from the apps new owner if you have issues. The demo has all the features of the paid for version except that it limits how many moons can be transferred. If, like me, you only keep a few current reads on the tablet and keep everything else in calibre, that may be all you need.
Or, if you have installed moon reader, that can connect directly to a calibre server called OdPs, or opds, and a forum Search will bring up how to set that up