Thread: Calibre conversion fail all formats
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Old 05-12-2018, 08:30 AM   #4
davidfor
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Quote:
Originally Posted by katzsis View Post
The error message is this: 'Invalid regular expression: incomplete escape \U at position 11'
This is the problem.

Firstly, whenever calibre displays an error like this, the dialog will have a "Details" and a "Copy" button. Pressing details will show more information about the error. Pressing copy will copy the full details to the clipboard so that you can post it in a thread like this. And with those details, giving help is a lot easier.

In this case, I think it means that there is a regular expression in your conversion options that is invalid. The only place I can see that uses a regular expression is on the "Search & Replace" tab of the conversion options. This can have several expressions, so you need to check what you have and fix them.
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