COPY INTO FROM STDIN and auto increment column

Hi, We are facing problems with COPY INTO .. FROM STDIN and an auto increment column, which is the primary key column in the table. The client is our own java client. If we don't set any value for this column (which is our expected constellation) there is neither error nor exception, but no record is inserted into the table. A try with a null value for this column produces the same result (no exception, no record in the table) The only way to insert records is to set the proper value for the column, but it is not the supposed behavior of an auto increment column, isn't it? Best regards, Fadila