Unknown Result Type

Hi,

Does anybody know what could lead to the following two
errors I ran into - 

1. Cannot handle multiple result groups.
    at
org.postgresql.Connection.ExecSQL(Connection.java,
Compiled Code)
    at
org.postgresql.jdbc2.Statement.execute(Statement.java,
Compiled Code)
    at
org.postgresql.jdbc2.Statement.executeQuery(Statement.java,
Compiled Code)
    at
org.postgresql.jdbc2.PreparedStatement.executeQuery(PreparedStatement.java,
Compiled Code)

This seems to have been followed by a whole lot of
occurences of -

2. Unknown Response Type ^@
    at
org.postgresql.Connection.ExecSQL(Connection.java,
Compiled Code)
    at java.lang.Exception.(Exception.java,
Compiled Code)
    at java.sql.SQLException.(SQLException.java,
Compiled Code)
    at
org.postgresql.util.PSQLException.(PSQLException.java,
Compiled Code)
    at
org.postgresql.Connection.ExecSQL(Connection.java,
Compiled Code)
    at
org.postgresql.jdbc2.Statement.execute(Statement.java,
Compiled Code)
    at
org.postgresql.jdbc2.Statement.executeQuery(Statement.java,
Compiled Code)
    at
org.postgresql.jdbc2.PreparedStatement.executeQuery(PreparedStatement.java,
Compiled Code)

I normally do not see this happen, and do not know if
I can replicate this error reliably. Any information
regarding the meaning/cause of this error and whether
there is a way to get around it/avoid it, would be
really helpful.

Thanks,
Rini


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