Hello,

I want to build an S-function in C with the "S-function builder dialog
box". I want it to read data from a file and put in at the output. So
I do not have direct feedthrough (I don't even have input signals). 

How can I tell the builder that the function does not have direct
feedthrough? He creates the function with direct feedthrough and it
can't run because of it.
Thank you!