Copy from stdin?????

Help Needed....

I have a Java program that is trying to execute a "copy tempfile from
stdin". The following error occurs. "Unknown Response Type".

I have a thread (called Producer) that is piping back data to another
thread (called Collector) that is trying to copy the piped data to a
Postgres database called tempfile. I know that there is data there,
because I can print it. If I do a "copy tempfile from (a data file)" its
works, but not from stdin.

Any ideas.

Thanks

Art