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