Upgrade to1.5.15 FATAL ERROR: undefined call to apc_delete()

[rh5547]

Having upgraded to version 1.5.15 recently, we've been having trouble with this error:

Fatal error: Call to undefined function apc_delete() in /sitelocation/public/htdocs/libraries/joomla/cache/storage/apc.php on line 87

It occurs when you save or apply content in the joomla (both articles and modules). The articles/modules DO save and apply properly but I would like to understand this error and eradicate it.

Thankyou for your help!

Richard

[lkl]

SOLVED
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I had the same issue and banged my head few times before I found the reason and solution. This error occurs when you have the wrong tmp and log path value in Global Configuration of your Joomla installation.

So change change these values to the correct ones and error would gone away.

[fish4red]

I had same error but the file paths to my tmp and log directory wre correct.

However, I compared the config file to another site that was working and found the I did have a difference..

About line 25 was set to acp instead of file.

var $cache_handler = 'acp';

Changed it to file and everything is working again.