RMAN error with multiple channels

Hi

I am evaluating TDP 2.2 (Tivoli Data Protection for Oracle) 
to backup oracle database using RMAN. I did a full backup 
with 5 RMAN channels. The RMAN backup includes about 15 backup peices size 
ranging fron 9gb-23gb. Now I am trying 
restore using multiple channels(4) which is failing after
restoring about 30%. I tried restore with just 2 channels 
which also failed after 80%. I am getting either "Session 
rejected: Communications protocol error" or "datafile xx not 
restored due to missing or corrupt data"  errors.

I am wondering if anyone encountered such problem and how 
they fixed it. The problem happens only when multiple 
channels are used. With single channel the  restores works 
just fine. The Oracle version is 9.2.0.4 and the backup 
server has 7 diskpools. 

Thanks 
Manmohan




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