Hi, A type conflict would happen when structures of <l_field> and <l_itab> do not match in the run time.
For ASSIGN <l_field> TO <l_table> this statement to execute successfully, <l_field> must be of table type, however, it seems that it is of a structure type rather than a table type.
Kindly check and make changes accordingly.
I hope this will fix your issue.
Thanks
Mohit