[Howlingwolf]

Ah... What light through yonder window breaks...


I'm reading the metadata from the source file like this:

with open(src_file, 'rb') as tmp_file:
	src_metadata = get_metadata(tmp_file, src_type, force_read_metadata=True)

So naturally it won't contain the custom field...

OK. So if I'm interpreting this correctly. I need to add the custom field 'definition' to the source metadata object, THEN set the field data using .set()



EDIT:

That worked perfectly.

Thanks for your help. It's much appreciated.