Have you rebuilt the index, and you still get the same error message?

>What about a situation what none of the resons ou are saying is the case?
>
>>Usually bad network connections, or people restarting their computers without shutting down properly. Or power failure.
>>
>>>What kind of hardware problem?
>>>
>>>>It's usually a hardware problem, or someone has 'pulled the plug' abnormally.
>>>>
>>>>>What would the reasons for the following message be?
>>>>>Index file "tablename.cdx" is corrupted. Please rebuild it
>>>>>
>>>>>Thanks