Not enough information for file created with tkprof

Hi,

I used tkprof to read a trace file by submitting the command "tkprof cdprdb_mmon_25165970.trc test.txt", but the produced file only show the following lines...

"

...

Trace file: cdprdb_mmon_25165970.trc

Trace file compatibility: 11.1.0.7

Sort options: default

       1  session in tracefile.

       0  user  SQL statements in trace file.

       0  internal SQL statements in trace file.

       0  SQL statements in trace file.

       0  unique SQL statements in trace file.

   26559  lines in trace file.

       0  elapsed seconds in trace file.

...

"

Altought the trace file is not empty, why I there is no additional information in the txt file created???