Error with Portal Infranet Adapter

We have a Infranet Adapter with version 4.0 running on webMethods version 4.1 091801 adkVersion “4.2i (4)” and Broker version 4.0.

Adapter Infranet is working, but some times when “Infranet Application” catch error “BAD VALUES” all following transactions returns error “ERR_STREAM_EOF”
even the transaction has correct data the application doesn’t receive the event. Only way to fix that is restart the adapter.

There are some patch for the this problem???
thanks in advanced