DocX to Epub convertion -> NCX-identifier does not match OPF identifier

I saved an epub file from a docx file and validated this epub against

It says:

NCX identifier (‘uid’) does not match OPF identifier (‘urn:uuid:eda164b8-9aad-45aa-95cc-1784901b9871’).

Then, I looked inside the epub and found out that these values are different:

ncx.png (14.7 KB)

opf.png (25.8 KB)

Is it possible to set these tags to the same value so that the epub can be validated successfully?

Thanks in advance,



Thanks for your inquiry. We tested the scenario and have managed to reproduce the same problem on our end. For the sake of correction, we have logged this problem in our issue tracking system. The ID of this issue is WORDSNET-19094. We will further look into the details of this problem and will keep you updated on the status of correction. We apologize for your inconvenience.

The issues you have found earlier (filed as WORDSNET-19094) have been fixed in this Aspose.Words for .NET 20.9 update and this Aspose.Words for Java 20.9 update.