I have 2 tunnels that work fine. I tried adding a third tunnel. When I go to test it in packet tracer I get a failure at the second vpn lookup which is encryption. When packet tracing the other two tunnels, they look identical except they don't fail. I did this in asdm. I then pulled the config and compared the new tunnel with the old ones, and they are all parallel, so this makes no sense.
I have this problem too.