XTendM3 override input parameter value

Rene Bottern

I am creating a PRE Trigger on a API Call.

There is a need to override the value of one of the Input Parameter, but I have not been able to do so for some reason?

I have tried: 

mi.in.put("Field","NewValue")

But of course this tells me the below (which makes sense, but I'm not sure what options are available?).

Any suggestions would be appreciated.

Rene Bottern

I think I have answered my own question.
I should use 'TransactionAPI' instead of 'MIAPI'.
Oh well, maybe someone else finds this useful.