No problems with permissions, otherwise the error would be like "can't write....."
The permissions are OK:
/opt/otrs/var/tmp/CacheFileStorable/DynamicField/6:
drwxrws--- 3 apache apache 60 Jul 27 13:54 2
drwxrws--- 4 apache apache 80 Jul 27 13:54 3
drwxrws--- 3 apache apache 60 Jul 27 13:54 4
drwxrws--- 4 apache apache 80 Jul 27 13:54 6
drwxrws--- 3 apache apache 60 Jul 27 13:54 7
drwxrws--- 3 apache apache 60 Jul 27 13:54 a
drwxrws--- 4 apache apache 80 Jul 27 13:54 e
.....
The Cache is working good, only these problems with DynamicField are ocurring.