Hi Alec, point taken. I tried saving with and without panel header and one measure space but no joy. I do realise that each voice is assigned to a separate track but I assume that a 'Program Change' command can be included to dynamically change the voice in any particular track. Perhaps I'm asking too much of the KN's conversion system and would be better using an external editor to do the job.
The reason I wished to convert the file was to include it in one of my web pages, since I believe that a midi file is the only reasonable format to use in such an application.

Cees, thanks for the tip, I'll have a look at that later today, but as Alec says, maybe it is not worth the effort It's the first time I've tried the procedure and may be the last

Thanks to both for your response.....

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Willum