Hi Marco,
I set up this parameters in sqlnet.ora file:
TRACE_LEVEL_CLIENT = 16
TRACE_FILE_CLIENT = ora_1400
TRACE_DIRECTORY_CLIENT = d:\temp
TRACE_UNIQUE_CLIENT = TRUE
I made a test using BDE and this parameters in sqlnet.ora file and I got a ".trc" file, but when I use DOA I get no .trc...