in ibVerbsZero.cpp in noc_extension branch there is this #define ARRAY_SIZE 1000 which is fixed. If our example uses more than 1000 message slots, it crashes with the error: <img width="888" height="91" alt="Image" src="https://github.com/user-attachments/assets/30ae4127-354d-40ee-a7c5-a61b7bee1cbe" /> In branch zero_engine_MR this is already fixed.