/LOG_FILE=file-specification
   /NOLOG_FILE

   Specifies whether a log file for the collection is to be created
   and where the contents of the log file is to be displayed.

   This file is similar in content to the log file created when you
   issue the Digital Test Manager SUBMIT command to run a collection of
   tests in batch mode. The log file contains output the test run
   generates other than the output from the test itself, such as
   output the prologue and epilogue files generate.

   The /LOG_FILE qualifier creates a log file in the specified file.
   The output is directed to SYS$OUTPUT. The /NOLOG_FILE qualifier
   suppresses the creation of a log file.