I think I managed to get a working configuration.

I would like to have your opinions.

I am running RH 8 with Samba 3.0.5

1) No samba shared mounted on Linux (this way I avoid smbfs)

2) Parameters in smb.conf for the share:
-locking = yes
-veto oplock files = *.dat/*.k*/*.hdr (in my case)
-strict locking = no


That last parameter seems to be the one that avoided writing new records
to a file by the windows program while that same file was open by the
Linux program.

Regards