[TYPO3-install] Re: Re: Blank page after upgrading from 6.1.7 to 6.2

[Andrey Aksenov]

[quote]Is your typo3conf/ folder writeable?

Do you see a PackageStates.php file in that folder?

A blank page means some sort of PHP error.

Best regards[/quote]
 typo3conf - is writeable (2775)
PackageStates.php file is not there

Created only empty folders:
 locks
Cache
--Code
----cache_core
--Data
----cache_classes

And in the folder cache_classes contains the following files:
typo3_cms_core_cache_backend_simplefilebackend
typo3_cms_core_cache_cache
typo3_cms_core_cache_cachefactory
typo3_cms_core_cache_cachemanager
typo3_cms_core_compatibility_globalobjectdeprecationdecorator
typo3_cms_core_locking_locker
typo3_cms_core_log_loglevel
typo3_cms_core_package_dependencyresolver
typo3_cms_core_package_exception
typo3_cms_core_package_exception_packagemanagercacheunavailableexception
typo3_cms_core_package_exception_packagestatesunavailableexception
typo3_cms_core_package_packagefactory
typo3_cms_core_package_packagemanager
typo3_cms_core_utility_extensionmanagementutility
typo3_flow_package_packagefactory
typo3_flow_package_packagemanager
typo3_flow_package_packagemanagerinterface

And it all ...
I understand that this is a mistake PHP, but how to see what kind of error?