Hallo,
vielleicht hilft das ja.
http://docwiki.embarcadero.com/RADSt..._%28FireDAC%29
Also:
Set TField.AutoGenerateValue to arAutoInc for an auto-incrementing field. This method does not create a TFDAutoIncField, it works with any field type, and may require additional field properties setup, like setting ProviderFlags, Required and ReadOnly.
Zu spät ... (AutoInc)
So, jetzt zeig mal deine Tabellenstruktur.
Heiko