The STARTPAGE= option is used to control page breaks with ODS output.
However page breaks are not suppressed when the NOTITLES option is
specified on a FILE PRINT statement.  Removing the NOTITLES option
corrects the problem.  The sample below incorrectly creates two pages
of output instead of one:

  ods pdf file="file.pdf" startpage=no;
  title;
  data _null_;
    file print notitles;
    put "First data _null_" ;
  run;
  data _null_;
    file print notitles;
    put "Second data _null_" ;
  run;
  ods pdf close;

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