I_STEP in customer user-exit for variable

The enhancement RSR00001 (BW: Enhancements for Global Variables in
Reporting) is called up several times during execution of the report. Here,
the parameter I_STEP specifies when the enhancement is called up.

The following values are valid for I_STEP:

· I_STEP = 1

Call up takes place directly before variable entry

· I_STEP = 2

Call up takes place directly after variable entry. This step is only started
up when the same variable could not be filled at I_STEP=1.

· I_STEP = 3

In this call up, you can check the values of the variables. Triggering an
exception (RAISE) causes the variable screen to appear once more.
Afterwards, I_STEP=2 is also called up again.

· I_STEP = 0

The enhancement is not called from the variable screen. The call up can come
from the authorization check or from the Monitor.