Sorry Jon, Still get the same problem.
Same error message with "Series" highlighted in the formula.

"Jon Peltier" wrote:

Wild guess: some localized versions of Excel require arguments in
functions to be separated by semicolons instead of commas:

=Series(Data!$AI$1;Data!$AH$2:$AH$10;Data!$AI$2:$A I$10;1)

- Jon
-------
Jon Peltier
Peltier Technical Services, Inc.
http://peltiertech.com/



hoyos wrote:
I am following the example from 'Peltier' site.
All goes well until I get to changing the chart's data source.
It tells me to insert the following formula:
=Series(Data!$AI$1,Data!$AH$2:$AH$10,Data!$AI$2:$A I$10,1)
But with no luck, I get the following message "THAT FUNCTION IS NOT VALID"
Any ideas