Hi,

When it comes to this message, it doesn't necessarily mean a problem with an object or index.

Please check the following articles:

https://support.microsoft.com/en-us/kb/2451688

https://support.microsoft.com/en-us/kb/2878968

Event though there is not a direct solution, those articles provide light over a very annoying error, and you can verify the "Symptoms" and "Cause" sections, looking for the scenario that applies to your case.

Hope this could help.

Regards,

W.-