declare
  out_file       utl_file.file_type ;
  lv_data        long ;
begin
  dbms_output.put_line('step1') ;
  out_file := utl_file.fopen('/export/home/wpsdata/casp','recv4.edi','r');
  dbms_output.put_line('step2') ;
  begin
    utl_file.get_line(out_file,lv_data);
  exception
    when others then
      utl_file.fclose_all ;
      dbms_output.put_line('lv_data:'||lv_data) ;      
      dbms_output.put_line('step3:'||sqlcode||':'||sqlerrm) ;      
  end ;
  utl_file.fclose_all ;
  dbms_output.put_line('end') ;
exception
  when others then
    utl_file.fclose_all ;
    dbms_output.put_line('step4:'||sqlcode||':'||sqlerrm) ;      
end ;

<comdb04-oracle@stagedb02.hitbox.com:/a/oracle:> oerr ora 29284
29284, 00000, "file read error"
// *Cause:  An attempt to read from a file failed.
// *Action: Verify that the file exists, and that it is accessible, and 
//          that it is open in read mode.

SCOTT@orcl_11g> declare
  2    out_file       utl_file.file_type ;
  3    lv_data	      long ;
  4  begin
  5    dbms_output.put_line('step1') ;
  6    out_file := utl_file.fopen('ORACLE11G','test.dat','r', 5);
  7    dbms_output.put_line('step2') ;
  8    begin
  9  	 utl_file.get_line(out_file,lv_data);
 10    exception
 11  	 when others then
 12  	   utl_file.fclose_all ;
 13  	   dbms_output.put_line('lv_data:'||lv_data) ;
 14  	   dbms_output.put_line('step3:'||sqlcode||':'||sqlerrm) ;
 15    end ;
 16    utl_file.fclose_all ;
 17    dbms_output.put_line('end') ;
 18  exception
 19    when others then
 20  	 utl_file.fclose_all ;
 21  	 dbms_output.put_line('step4:'||sqlcode||':'||sqlerrm) ;
 22  end;
 23  /
step1
step2
lv_data:
step3:-29284:ORA-29284: file read error
end

PL/SQL procedure successfully completed.

SCOTT@orcl_11g> declare
  2    out_file       utl_file.file_type ;
  3    lv_data	      long ;
  4  begin
  5    dbms_output.put_line('step1') ;
  6    out_file := utl_file.fopen('ORACLE11G','test.dat','r', 10);
  7    dbms_output.put_line('step2') ;
  8    begin
  9  	 utl_file.get_line(out_file,lv_data);
 10    exception
 11  	 when others then
 12  	   utl_file.fclose_all ;
 13  	   dbms_output.put_line('lv_data:'||lv_data) ;
 14  	   dbms_output.put_line('step3:'||sqlcode||':'||sqlerrm) ;
 15    end ;
 16    utl_file.fclose_all ;
 17    dbms_output.put_line('end') ;
 18  exception
 19    when others then
 20  	 utl_file.fclose_all ;
 21  	 dbms_output.put_line('step4:'||sqlcode||':'||sqlerrm) ;
 22  end;
 23  /
step1
step2
end

PL/SQL procedure successfully completed.

SCOTT@orcl_11g>