[Zope] ZGDChart - insificient height

[Smith, Neil]

I am using ZGDChart to produce some charts from data from a ZSql method.
The SQL method returns a character string for the first field, and a number
for the second.  I'm having trouble with the length of the character
strings.  If they get fairly long, 26 characters seems to start the trouble,
then I get the message "insificient height" (their spelling, not mine).
Increasing the height of the chart sometimes seems to help, but sometimes
doesn't, and there doesn't seem to be any simple relation between the length
of the strings and the height that the chart needs to be.  A chart that is
500 pixels wide and 250 pixels high might accept character strings of 25
characters, but then for 26 characters it could need to be made 800 pixels
high.

Has anyone come across this problem and made any sense of it?

--
Neil
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