Read dynamic field symbol Work Area before append to dynamic table

Hi experts:

I have a dynamic work area but before doing an append to the dynamic table, I need to do some validation on some fields of the work area in order to decide to append it or not, but I don't know how...

More or less this is the example

loop at so_kschl.

field = so_kschl-low.

if <t_dyntable>-field = 0. "if the value of this field in dinamic table is 0.

• don't append

else.

APPEND <fs_dyntable> TO <t_dyntable>.

endif.

endloop.

Thank you very much for your help.

Miriam