errors in log files

[popustda]

Hi,
Can some1 tell me why i have these errors? Are they connected with product purchase reports because they are not showed correctly in my shop or something else?
I have like 50 of these every day.

2014-05-20 12:42:57 - warning:  AbanteCart core v.1.1.8 filemtime() [<a href='function.filemtime'>function.filemtime</a>]: stat failed for /home/topducan/public_html/system/cache/resources/resources.103535.1400582541 in <b>/home/topducan/public_html/core/lib/cache.php</b> on line <b>54</b>
2014-05-20 12:42:57 - warning:  AbanteCart core v.1.1.8 filemtime() [<a href='function.filemtime'>function.filemtime</a>]: stat failed for /home/topducan/public_html/system/cache/resources/resources.103534.1400582541 in <b>/home/topducan/public_html/core/lib/cache.php</b> on line <b>54</b>
2014-05-20 12:56:28 - warning:  AbanteCart core v.1.1.8 filemtime() [<a href='function.filemtime'>function.filemtime</a>]: stat failed for /home/topducan/public_html/system/cache/balance/balance.269.1400669766 in <b>/home/topducan/public_html/core/lib/cache.php</b> on line <b>54</b>
2014-05-20 12:58:46 - warning:  AbanteCart core v.1.1.8 filemtime() [<a href='function.filemtime'>function.filemtime</a>]: stat failed for /home/topducan/public_html/system/cache/resources/resources.103859.1400583525 in <b>/home/topducan/public_html/core/lib/cache.php</b> on line <b>54</b

Thank you in advance

[abolabo]

it is not errors. it's a warnings. try to clear cache

[popustda]

thanks