"CRS - Psy Sel/SPO, COUSSEMENT Christophe, CPN" wrote:

> Thanks for the suggestion, but the system HAS to work in real time: the
> results file have to be processed immediatly.

The simplest way might be to serialize access using a server. Your
server process takes care of updating your file; it stays there
listening to a TCP port and accepts one connection at a time only.
Your clients just connect to the server and send it the data.

HTH,
   Gabriele.
-- 
Gabriele Santilli <[EMAIL PROTECTED]> - Amigan - REBOL programmer
Amiga Group Italia sez. L'Aquila -- http://www.amyresource.it/AGI/

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