If this function is not available, and returns the #NAME? error, install and
load the Analysis ToolPak add-in.

How?

On the Tools menu, click Add-Ins.
In the Add-Ins available list, select the Analysis ToolPak box, and then click
OK.
If necessary, follow the instructions in the setup program.


The above is copied directly from Help on CUMPRINC.

If not the case, what results or lack of results are you experiencing?

Gord Dibben Excel MVP

On Thu, 24 Mar 2005 16:29:03 -0800, "Asterix"
wrote:

Xcell has help screens for many functions like CUMPRINC. However, they are
not recognized as valid functions.