A static public class method, zcl_abc=>dosomething, has an importing parameter
it_lines type TLINE_T optional
And there is a FM called zfm_dosame. It has a parameter
TABLES IT_LINES TYPE TLINE_T OPTIONAL
zfm_dosame calls zcl_abc=>dosomething and tries to pass it_lines to it_lines. However, syntax error:
IT_LINES is not type-compatible with formal parameter IT_LINES.
This error drives me crazy. I have no idea how come... Please help!
The TABLES part of a function interface creates internal tables with header line at runtime.
So in order to pass the entire table, instead of just one work area, you should pass
IT_LINES instead of
IT_LINES to the method you're calling.