DTM> COMPARE MAIL_COLL
   %DTM-I-SUCCEEDED, the comparison for the test MAIL_TEST succeeded
   %DTM-I-SUCCEEDED, the comparison for the test SEND_MAIL_TEST succeeded
   %DTM-S-COMPARED, collection MAIL_COLL compared
   DTM>

   This example compares the results for all tests in the
   collection MAIL_COLL. For each test, Digital Test Manager deletes
   the result files for tests whose benchmark and result files
   match, and it creates a difference file for tests whose
   benchmark and result files differ.