[issybird]

Originally Posted by conversionerror

I've tried both online services and software, but it fails even though it can be opened by readers.

Here's the file I am trying to convert

The file is too many pages long, so much so that it cannot even be opend by the reader without freezing, therefore dividing it into several smaller ones would help

Here's the message that pops up in Calibre reader.

https://file.town/stats/sl4ck33yg8eqpx7d4hq6r1875

Already asked and answered in another subforum, and the appropriate one. Please don't keep posting in the hopes of an answer more to your liking.