[stumped]

i could not figure out why add book was not working on a 46MB book from my kindle docs folder..

I'd stopped, started calibre a few times, even updated the alf plugin in case that was the issue

then I realised i was trying to add the English Dictionary that K for PC had helpfully downloaded recently, and not the book I thought I was adding- whoops.

So OK, I don't need to add this, but I am puzzled as to why I can't.
I would expect a format conversion to fail, on a dictionary, but I should be able to just add it into the library, like any other .azw file?

and there is no error message, just that the add popup never gets past 0%

would it work if allf was not present. I don't want to remove that, but if there's some start calibre in safe mode option - i.e. with all plug ins disabled- I could see what happens then ?

i assume that anyone who downloads the dictionary via K for PC gets the same file, so it should be easy to replicate the bug - if it is a bug. In my docs folder it is a file called B003WUYRGI_EBOK.azw 46,388Kb