You don't need to remove the entire concrete5 installation.

I assume you did.

Hard way:
If not please make sure you really deleted all files in your /concrete5 folder and cleaned your database from c5.

Easy way:
Next time just delete contents in /files/cache /files/cache_objects and
/config/site.php Then clean your database.

After that you can install a fresh concrete5.

The problem is that I did remove the entire c5 installation and it still work like I wouldn't. Is there a cache or something? I don't understand...

as he said:

its probably the cache on your webserver if you deleted everything

I just move my files and database to another host. But I forgot to clear the cache before I move the site. Now it gives me this error:

"Fatal error: Uncaught exception 'ADODB_Exception' with message 'mysql error: [-32000: Cache write error] in CacheExecute(/home/mysite/public_html/files/cache/dc/adodb_dcd7582741a8e5bc6d22cbeb22d7c635.cache, select btID from BlockTypes where btIsInternal = 0) ' in /home/mysite/public_html/concrete/libraries/3rdparty/adodb/adodb-exceptions.inc.php:78 Stack trace: #0 /home/mysite/public_html/concrete/libraries/3rdparty/adodb/adodb.inc.php(1819): adodb_throw('mysql', 'CacheExecute', -32000, 'Cache write err...', '/home/mysite/...', 'select btID fro...', Object(ADODB_mysql)) #1 /home/mysite/public_html/concrete/libraries/database.php(34): ADOConnection->CacheExecute(10, 'select btID fro...') #2 /home/mysite/public_html/concrete/models/permissions.php(468): Database->querycache(10, 'select btID fro...') #3 /home/mysite/public_html/concrete/models/permissions.php(72): CollectionPermissions->CollectionPermissions(Object(Page)) #4 /home/mysite/public_html/concrete/models/permissions.php(116): PermissionsProxy::getN in /home/mysite/public_html/concrete/libraries/3rdparty/adodb/adodb-exceptions.inc.php on line 78."


Now my question is that if I delete the files from those folders, but not delete anything from the database, then do you think the problem is gonna be solved? or please tell me what to do?

(I don't want everything to be refreshed, I wanna keep my site as same as the one on the other host)

yes that should work also make sure the server had the permission to write to that folder

yes, I just did with a huge fear, but fortunately, it worked :)

yes, it was a problem with the webserver
Thank you

just curious,
what do you mean by 'clean your database'
i'm having some c5 bugs with core plugins like page list, so i would like to do a clean re-install/reset of concrete, and hopefully keep my database, files etc.. is there a good resource/thread you can recommend for cleaning a database?

thanks in adv..

I'm pretty sure he's talking about removing data from the database. This isn't what you want to do. You would lose your data which wouldn't be good.

You can't really "clean" a database how you are thinking. It's just lost in translation. Maybe you can start a topic with one of the problems your having?

Do you know how this works in version 5.7?