Note that ISERROR() will mask all other errors, not just #DIV/0 errors.
In general it's better to trap known conditions that might cause errors,
and let unexpected errors pass through.
Thanks but I'm still having trouble. Following is the formula I'm
using...can you show me how to include the ISERROR function? When I do it,
then input data in the e16..n16 range, I get the FALSE error.
Tried...but when data is entered in e16..n16, I get a blank cell when there
should be an numeric answer. If there is a way I could show you the
worksheet, you cpould better see what I mean.