Title: 404 Errors
Last modified: February 3, 2018

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# 404 Errors

 *  Resolved Anonymous User 14978628
 * (@anonymized-14978628)
 * [8 years, 7 months ago](https://wordpress.org/support/topic/404-errors-86/)
 * Hey Frank,
 * I’ve been getting a few 404 errors recently for AO css and js files. These are
   AO files in the wp-content cache directory.
 * Not sure why this is happening or what to do about it?

Viewing 5 replies - 31 through 35 (of 35 total)

[←](https://wordpress.org/support/topic/404-errors-86/page/2/?output_format=md) 
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 *  Thread Starter Anonymous User 14978628
 * (@anonymized-14978628)
 * [8 years, 3 months ago](https://wordpress.org/support/topic/404-errors-86/page/3/#post-10389163)
 * Support response to above:
 * > While I totally trust him when he says this is pointless, this method exists
   > in their code and is available to run so it was created for a reason otherwise
   > we couldn’t have removed that cache. If AO is doing all the work automatically,
   > then such a function would be obsolete and without purpose / shouldn’t exist.
 * Is the following true? Does clearing the AO cache not clear the css/js?
 * > Again, this function doesn’t clear your css/js files generated by AO, probably
   > just the cached pages.
 *  Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/)
 * (@optimizingmatters)
 * [8 years, 3 months ago](https://wordpress.org/support/topic/404-errors-86/page/3/#post-10389759)
 * The sole purpose of this function is to clear the css/js files generated by AO.
 *  Thread Starter Anonymous User 14978628
 * (@anonymized-14978628)
 * [8 years, 3 months ago](https://wordpress.org/support/topic/404-errors-86/page/3/#post-10390819)
 * > The sole purpose of this function is to clear the css/js files generated by
   > AO.
 * Does clearing the css/js always result in new filenames? Or can you explain under
   what conditions new filenames are generated?
 * The support member seems to think the AO cache is not being cleared, as he still
   sees the same filenames after cache clearance.
 *  Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/)
 * (@optimizingmatters)
 * [8 years, 3 months ago](https://wordpress.org/support/topic/404-errors-86/page/3/#post-10390875)
 * The support member is wrong, files _are_ being cleared from cache. Depending 
   on the circumstances new filenames will or will not be created. Also; immediately
   after clearing AO will automatically warm it’s own cache, and that is what probably
   leads our support member friend into believing the CSS/JS cache is not cleared.
   But believe me when I say the support member is wrong 🙂
 * (real stubborn guy, that support member, the only thing he _really_ should do,
   instead of questioning all of this, is just tell the devs to remove that `autoptimizeCache::
   clearall()`-call because the AO-developer says they should not call that function
   upon every post publish/update because it’s hurting performance significantly!)
 *  Thread Starter Anonymous User 14978628
 * (@anonymized-14978628)
 * [8 years, 3 months ago](https://wordpress.org/support/topic/404-errors-86/page/3/#post-10395033)
 * Support has agreed to pass it on to developers. Hopefully they will remove the
   function!
 * Thanks for your help 🙂

Viewing 5 replies - 31 through 35 (of 35 total)

[←](https://wordpress.org/support/topic/404-errors-86/page/2/?output_format=md) 
[1](https://wordpress.org/support/topic/404-errors-86/?output_format=md) [2](https://wordpress.org/support/topic/404-errors-86/page/2/?output_format=md)
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 The topic ‘404 Errors’ is closed to new replies.

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 * 35 replies
 * 4 participants
 * Last reply from: Anonymous User 14978628
 * Last activity: [8 years, 3 months ago](https://wordpress.org/support/topic/404-errors-86/page/3/#post-10395033)
 * Status: resolved