cannot start with 4 AIO virtual processor

Hi, OS: NT4 IDS 9.21 Last saturday i was trying to make a level 0 backup so i execute: ontape -s -L 0 And it gives me this message: Warning: Dynamic Sever 2000 cannot start with 4 AIO virtual processor, limit exceeded. Started with 1 AIO virtual processor. I didn't configure the onconfig. When i look at the onconfig it says "NUMAIOVPS 4", that seems toolow for my understanding (btw, we have 61 chunks)... but, why on earth it says "limit exceeded"? it could be that ontape is trying to create a fifth AIO vp and we have to increment the NUMAIOVPS? at least, that is my version if you can confirm, i can be more sure to tell to my boss... PS: the informix consultant says us we try to decrease the value to 3.... that's seems very ugly to me... regards, Jaime Casanova