Hello Zoltan, I am trying to understand why "test_44_unbox_trampoline" (objects.cs) fails. I could not figure out the logic. :( Could you shed some lights? I guess "mono_arch_get_vcall_slot_addr" and "mono_arch_get_unbox_trampoline" should be implemented. Thank you, Sergey. tsv at solvo.ru Solvo Ltd.