Access to site error

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We have two installations of Concrete 5 within the same site. One is the public facing site, then entry to the private site is via a log-in.

When we try to log-inn to the private site, this error message is now showing

mysqlt error: [1017: Can't find file: 'CollectionVersionBlocksOutputCache' (errno: 2 - No such file or directory)] in EXECUTE("select btCachedBlockOutput, btCachedBlockOutputExpires from CollectionVersionBlocksOutputCache where cID = '421' and cvID = '31' and bID = '1449' and arHandle = 'Header Image' ")
.

I have asked our Web Hosts to look into it but they are saying it could be a problem with the database.

I have made no changes to any of the PHP Code, however my client has a new user updating the site. Could a new user cause such a catastrophic error?

On my host error logs I have several around the same time they include

[25-Apr-2015 00:40:37 Europe/London] PHP Warning:  rmdir(/home/girlgu01/public_html/kerensa/files/cache/pages/l/o/g): No such file or directory in /home/girlgu01/public_html/kerensa/concrete/core/helpers/file.php on line 99


[25-Apr-2015 00:40:38 Europe/London] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/girlgu01/public_html/kerensa/concrete/core/helpers/file.php:99) in /home/girlgu01/public_html/kerensa/concrete/core/libraries/view.php on line 95


I am feeling totally out of my depth and would appreciate any help.

Thanks

Hoopergraphics
 
Hoopergraphics replied on at Permalink Reply
Hoopergraphics
Just to say my web host has sorted it for me.

So a big-up to Catalyst2 - probably went beyond the call of duty but found the problem and restored an old database back up for me.

I probably need to up my skills and learn more about this side of things!