I am not using the "master document" feature. All chapters are in the same document and the seq field works fine in the body text of the document.

I use a style separator to have the Heading 1 and chapnum styles on the same line. Heading 1 has the heading text. The chapnum style has the chapter number.

My Heading 1/Chapnum line looks as follows: Chapter title <pilcrow>{SEQ Chapter\* MERGEFORMAT}<pilcrow>

I want to put the chapter numer in the header.