Couldn't lock the file !

#0  secache->trigger_error(Couldn't lock the file !, 256) called at [D:\APMServ5.2.6\www\htdocs\core\include_v5\secache.php:391]
#1  secache->_format(1) called at [D:\APMServ5.2.6\www\htdocs\core\include_v5\secache.php:663]
#2  secache->trigger_error(Can't open the cachefile: , 256) called at [D:\APMServ5.2.6\www\htdocs\core\include_v5\secache.php:117]
#3  secache->create() called at [D:\APMServ5.2.6\www\htdocs\core\include_v5\secache.php:98]
#4  secache->workat(D:\APMServ5.2.6\www\htdocs/home/cache/cachedata) called at [D:\APMServ5.2.6\www\htdocs\core\include_v5\secache.php:38]
#5  secache->secache() called at [D:\APMServ5.2.6\www\htdocs\core\kernel.php:71]
#6  kernel->kernel() called at [D:\APMServ5.2.6\www\htdocs\core\include_v5\shopCore.php:16]
#7  shopCore->shopCore() called at [D:\APMServ5.2.6\www\htdocs\index.php:19]