Are they like arrowheads on a line? If so, format the error bars to remove
them. If not, I don't know what they are, because I haven't seen such
'gremlins', though I do not doubt your report of their existence.

- Jon
-------
Jon Peltier, Microsoft Excel MVP
Peltier Technical Services, Inc.
http://PeltierTech.com/WordPress/
_______


"tcek" wrote in message
...
Many of the error bar charts (standard deviation) I make end up showing
black
triangle figures. Very large ones across the graph. I have googled and
there
are other posts concerning such gremlins. None describe a fix. Has anyone
had
a problem with this?