"Operation invalid without a current index"

My database is split into a front end and a back end, with the back end
shared on our LAN. I need to add fields to an existing table on the back end.
When I click on the Tables tab I get the message "Operation invalid without a
current index". What does that mean, and how can I satisfy the requirement? I
have checked LDB viewer and verified that no one else is using the database.
I can open the front end and see all the data. All the forms, queries and
reports that I checked seem to work just fine. I'm stumped.

If you have opened the back end exclusively, the error indicates a
corruption.

Firstly, try a compact/repair (under Database Utilities on the Tools menu).

If that doesn't work, try rebuilding the database by following the 6 steps
for the first symptom in:
Recovering from Corruption
at:
http://members.iinet.net.au/~allenbrowne/ser-47.html

--
Allen Browne - Microsoft MVP. Perth, Western Australia.
Tips for Access users - http://allenbrowne.com/tips.html
Reply to group, rather than allenbrowne at mvps dot org.

"HG" wrote in message
...
My database is split into a front end and a back end, with the back end
shared on our LAN. I need to add fields to an existing table on the back
end.
When I click on the Tables tab I get the message "Operation invalid
without a
current index". What does that mean, and how can I satisfy the
requirement? I
have checked LDB viewer and verified that no one else is using the
database.
I can open the front end and see all the data. All the forms, queries and
reports that I checked seem to work just fine. I'm stumped.