Why I get an error message in TYPO3 Extbase on the second time?

Question

I write an extension and use TYPO3 8.7 extbase. When I clear all cache my extension works only by the first Page visit, the second page visit get this error message:

Cannot create empty instance of the class "Pit\PitExt\Domain\Model\Settings" because it does not implement the TYPO3\CMS\Extbase\DomainObject\DomainObjectInterface.

Where is the Problem? On the first Visit it implement the interface, on the second time not?

Thank you for any help.

Does Settings implement DomainObjectInterface? Did you flush all caches including Opcache? — Mathias Brodala
Yes. All Caches in install Tool. The Class extends from \TYPO3\CMS\Extbase\DomainObject\AbstractEntity with extends \TYPO3\CMS\Extbase\DomainObject\AbstractDomainObject and this implements DomainObjectInterface — Burner

Burner Burner · Accepted Answer · 2018-02-21T13:07:48

Sorry, my mistake. I had an upper / lower case problem. It is not "Pit\PitExt\Domain\Model\Settings" its "Pit\Pitext\Domain\Model\Settings". Now it works.

Why I get an error message in TYPO3 Extbase on the second time?

1 Answers