TYPO3 Core

Hello,

we tried to update a big installation from TYPO3 4.7.15 to 4.7.17 and the message

Cannot redeclare t3lib_pageSelect Error in ...

comes up with some old extensions. We also cleared all caches in typo3conf and typo3temp folder.

We saw the bug together with dam_frontend, tt_address and mw_imagemap. Probably some more extensions lead to this error.

In case of dam_frontend
There is a include_once in ext_tables.php:

include_once(t3lib_extMgm::extPath($_EXTKEY) . 'class.tx_damfrontend_addfilestosel.php');

And the file class.tx_damfrontend_addfilestosel.php at the beginning:

require_once(PATH_t3lib . 'class.t3lib_page.php');

We don't know if this error comes up with 4.7.16 or 4.7.17.