thank you I will look at these

It was the case, but my coworker gave me a client that works for our windows version of the software to test one for Mac.

I also tried it without any append cipher but same issue. I feel like I have something fundamental wrong.

oh I was trying several stuff and left the inout there.

Currently, the function itself seems to work. however, when the C function ends, it delocate value of parameter a and out.     a = logic.merge(a, b);     out.vest = a.vest;     out.arm = a.arm; is all of the code inside the merge itself.