OD0001: XML is not well-formed: Invalid byte 1 of 1-byte UTF-8 sequence.

Invalid byte 1 of 1-byte UTF-8 sequence.

This is a typical error when one does copy-past from Word documents or uses Excel for generation of define.xml. This is a Microsoft problem, not a define.xml or XML problem. Also see:
http://cdisc-end-to-end.blogspot.com/2015/03/creating-definexml-best-and-worst.html
and especially the comment of Lex Jansen at the bottom.

 

 

Thanks. That was indeed the

Thanks. That was indeed the problem. There were some characters entered as 'symbols' from word/excel. It would be very helpfull if the validator provided line numbers for these types of errors.

Encoding

You can blame this one on Microsoft. In XML you need to be really strict with your character encodings.