Plant and year will be direct selection from the MP. There is no customer exit here. Its just a direct input variable which will fetch values from the MP. Why can't I get them in i_step 1, as the sdn says, This parameter may or may not be INPUT type and mandatory or Optional and Processing type must be Customer Exit....so here in our case, its not the input type because customer will not enter doc type as input, and the 2nd condition is optional, which is correct as user will not enter it, and processing type is customer exit.
where as in step= 2, there is need of calculating the value of variable by the value of another variable....we do not have any base variable base to calculate or fetch the values from the ztable.....so this will be incorrect....as we are just fetching the values for already given values in the ztable and we don't need any base to fetch the values based on any input variable/value by the user.
How will it be step = 2 ? I will award you points after the correct resolution as it will be assumed answered, if I mark anything as correct. Dont worry about that.
thank you
DR