Quote:
Originally Posted by andhistablet
Thank you David for looking into this. I am using Windows 10 64-bit, and I thought I was using Calibre 64-bit, but I was not. I just installed 64-bit.
All of my books have already been converted to AZW3 prior to transfer, and that format is what I am sending to Kindle. Should I convert to KF8 or KFX as well?
Thanks again, and I will look at HarryT's thread now.
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AZW3 is calibre's filetype for KF8 so no need to do another conversion.
There have been several threads in which the original poster (OP in future) had a 32 bit version of calibre installed on a 64 bit version of Windows and was running into memory exhaustion. Changing to the 64 bit version of calibre helped in enough cases that it's almost a reflex to check that possibility.