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Andy Pope, Microsoft MVP - Excel
http://www.andypope.info
Andy: Thank you. Actually, I blundered onto the answer. It is the chart
type selection. In the menu of line chart types, the line chart on the far
lef-hand side of the box (with bumps) will accept a trendline. The next
chart option to the right (in the center of the selection box), which appears
to be identical (at least to me), will NOT accept a trendline. Go figure!
> 3d charts do not allow trendlines maybe this is your problem
>
[quoted text clipped - 10 lines]
> > this on two PCs, with the same document (and the same errors) - in other
> > words, I doubt if re-booting will fix it either.
Andy Pope - 11 Sep 2006 20:25 GMT
Ah yes, as well as 3d charts STACKED charts can not have trend lines.
Cheers
Andy
> Andy: Thank you. Actually, I blundered onto the answer. It is the chart
> type selection. In the menu of line chart types, the line chart on the far
[quoted text clipped - 16 lines]
>>>this on two PCs, with the same document (and the same errors) - in other
>>>words, I doubt if re-booting will fix it either.

Signature
Andy Pope, Microsoft MVP - Excel
http://www.andypope.info