disconnecting from pipes

I am using a pipe to have two thread communicate via a piped writer and piped reader. When done, both threads issue a flush and close on their respective pipes. Later I want to have the threads communicate again, so I try to set up another connection. I get an exception of "already connected". What else I need to do to disconnect the two pipes?

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[361 byte] By [p3oriona] at [2007-10-2 3:41:34]