-#define CHECK_HOST() xbt_assert0(SIMIX_host_get_state(SIMIX_host_self())==1,\
- "Host failed, you cannot call this function.")
+#define CHECK_HOST() xbt_assert1(SIMIX_host_get_state(SIMIX_host_self())==1,\
+ "Host failed, you cannot call this function. (state=%d)",SIMIX_host_get_state(SIMIX_host_self()))