avoiding queue bloking when IDoc fails

Hi

I wanted to know if is there any configuration i can do to send Idocs to SAP with QoS EO and asing one queue for each interface ?

I need two thing:

1) One queue per interface to avoid Idoc CREMAS be queued in the DEBMAS queue

2)if an IDoc fails, allowing other documents in the queue can be processed

for example i have an scenario where i receive novesties from differents plants, so if a novelty from plant 1 fails is not mandatory to avoid the processing of novelty from plant 2.

the parameter "maintain order at ruintime" in the Interface determination does not work, should i check the parameter queue processing in the IDOC channel?

Rgds

Rodrigo