Open dataset exception not triggered

Question

hello folks i'm having a dump because i can't open the dataset, but
when i use this code
open dataset p_file for output in text mode encoding default message mes.
if sy ne 0.
message mess type E.
endif.
the error is triggered but if i use:
TRY.
       OPEN DATASET p_file FOR OUTPUT
            IN TEXT MODE ENCODING DEFAULT.
     CATCH cx_dynamic_check  INTO gr_err.
       gs_msg = gr_err->get_text( ).
   ENDTRY.
in debug i can see sy-subrc = 8 but the catch is not trigger, i have also try with   cx_sy_file_authority but nothing, i'm in ECC6 unicode.
Regards

Answer 1

hy all thanx for you reply, i've also try to catch all the possible exception like this:
data gr_err TYPE REF TO cx_root,
TRY.
       OPEN DATASET p_file FOR OUTPUT IN TEXT MODE ENCODING NON-UNICODE.
     CATCH cx_sy_file_open INTO gr_err.
       gs_msg = gr_err->get_text( ).
     CATCH cx_sy_file_authority   INTO gr_err.
       gs_msg = gr_err->get_text( ).
     CATCH cx_dynamic_check  INTO gr_err.
       gs_msg = gr_err->get_text( ).
   ENDTRY.
still nothing catch and sy-subrc still 8.