PG wrote:

The one I downloaded turned out not to be win32, so I'll look for a
win32 version.

I couldn't see one, plenty of other gnome (well actually gtk) based
software ports OK(ish) to win32

Meanwhile, I've just found one or two others that might
do. I'm passing over the ones that cost $3,999 to register!

Sounds like Hoskyns PMW price from over a decade ago :-(

$39 is more like my price range. Freeware better still, if it's worth using.

Had another search http://ganttproject.sourceforge.net/
looks much more promising ...