CLIENT_TEXT_IO. How to flush output

Question

I use CLIENT_TEXT_IO package to produce a session log file on a client machine. My application is multi-form and I register in session's log file each form call. Also a called form may produce few log records (all application's forms share the same log file). The call to the logger precedes CALL_FORM statement, but in the log file a record informing about new form call follows records written from this call. Which means that my log record was buffered, but was not flushed to the file (although the logger opens log file for append, writes a log record and closes log file). So it looks like CLIENT_TEXT_IO works asynchronously and may disorder log records.
Is there any option to make CLIENT_TEXT_IO to work synchronously and to flush data immediately I send a record?
Any help will be appreciated.
Ilia

Answer 1

Thank you very much.
Synchronize really solved the problem.
BTW I open and close the log file each time when I write a log message. So the first proposed solution unfortunately does not help.
Now I am going to check whether I can avoid opening and closing file each time by using synchronize.
Thank you very much once more for your idea.
Ilia