F4 help in editable ALV Tables (OO)

Hi there,

I have question regarding F4 help and input validation in editable ALV tables:

We use a DDIC-structure to display the ALV table. Within the structure definition we entered a table as checktable. But in the ALV the input validation does not work now.

It works only when we maintain the parameter "checktable" in the field catalog.

Is it normal behavior that the field validation works only if we maintain it twice?

Thanks in advance and

Regards,

Martin