This was the answer; thanks. I will have to dig around and see if I can figure out how to destroy the duplicate column name from the database.
Quote:
Originally Posted by davidfor
That error says you already have a column with the lookup name "#myannotations". Or whatever name you used in the "Custom column wizard". The name you enter is used as the column header and is converted to lower case to be used as the lookup name. The error would only happen if you had used that name before.
A possibility is if you created the column, and didn't restart calibre. Then tried to do the configuration again (which is something I have done more times than I want to admit). At that point, I do not think the new column will not be in the list of suitable columns. But, if you tried to create it again, you would get this error.
I will look at putting some error handling in, but, in the meantime, check what calibre has in the the custom column list. The above should be there.
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