[Flow] how to upgrade from flow 2.1 to 2.2 / 2.3

[Robin Lehrmann]

Hi,

Am 18.02.2015 um 11:57 schrieb Mira:
>   But unfortunately the error message is more scary after this:
Is your doctrine-orm mapping in your entities valid?

I get compile errors with wrong orm-mapping sometimes.

Cheers,

Robin