Am Mittwoch, 28. Februar 2018, 08:34:21 CET schrieb Harsh Jain: Hi Harsh, > Try with gdb. AIO(-x 10) works fine with step by step debugging. Also > verified by adding print in "af_alg_async_cb" for received err value. > Driver is sending -74 here. I am unable to reproduce the issue. Both commands with sync and async operation work fine with me and using 1.0.3. Ciao Stephan