Can I open file in shared mode so that multiple users can write at same tim

Hi,
I want to write to a trace file from a user exit and BADI. But I want to create only one trace file in which multiple users can simultaneously append. Is it possible to do this? How? Code could really help as this is urgent.
Thanks for reading.

Hi,
I think we can use the locks shared or exclusive locks concept here
you can find examples in this section on how to implement them -
http://help.sap.com/saphelp_47x200/helpdata/en/41/7af4c5a79e11d1950f0000e82de14a/frameset.htm
There are two types of lock in the R/3 System:
Shared lock
Shared locks (or read locks) allow you to prevent data from being changed while you are reading it. They prevent other programs from setting an exclusive lock (write lock) to change the object. It does not, however, prevent other programs from setting further read locks.
Exclusive lock
Exclusive locks (or write locks) allow you to prevent data from being changed while you are changing it yourself. An exclusive lock, as its name suggests, locks an application object for exclusive use by the program that sets it. No other program can then set either a shared lock or an exclusive lock for the same application object.
Regards
Chandralekha
Regards
Chandralekha

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*T

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