I should have said, do this in cell A1,
Alan.

"Alan" wrote in message
...
You need Validation on the Data toolbar.
Data Validation, in the 'Allow' box, select 'Custom' In the 'Formula'
box that appears, enter =B1=0
Use the Error Alert tab to enter a suitable error message,
Regards,
Alan.
"Carol Sitea" wrote in message
...
I need to restrict entry in one cell if there is anything in the cell next
to
it. Only one entry per line. How can I do this?

Thanks in advance,
Carol

A B
Fed Other
1 1
2 1
3 1
4 1
5 3
6 2