what should I do if I got "Stream has outstanding operation" error.

[KC <kcc1967 gmail com>]

Hi,

I use g_output_stream_printf() to send command to a server
and use g_data_input_stream_read_line() to read data back.

Sometime I got error message "Stream has outstanding operation".
What should I do if I detect this error ?
Do I need to flush() the IO stream after g_output_stream_printf() ?

Thanks
KC