The following is from the Fiddler's Companion site:

**Please note that the abc's in the Fiddler's Companion work fine in most abc conversion programs. For example, I use abc2win and abcNavigator 2 with no problems whatsoever with direct cut-and-pasting. However, due to an anomaly of the html, pasting the abc's into the concertina.net converter results in double-spacing. For concertina.net's conversion program to work you must remove the spaces between all the lines of abc notation after pasting, so that they are single-spaced, with no intervening blank lines. This being done, the F/C abc's will convert to standard notation nicely. Or, get a copy of abcNavigator 2 – its well worth it.   [AK]

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So, the first step is to eliminate the spaces between lines, once the code has been pasted into the concertina.net converter. If that doesn't work, you may also have to eliminate one of more header lines - in particular, I believe that a header beginning with "F:" will cause things to fail or at least be botched up.

Good luck!

Don