The values for the average balance ledger are calculated using a function module. The name of the function module is defined in the format 'a_D_LEDGER_bc', where 'a', 'b' and 'c' are variable values. 'abc' is the exit number. Thus the name of exit number can be used to identify the function module. If the exit number is 'Z01', this means that the function module 'Z_D_LEDGER_01' will be called up for calculating the values for the average balance ledger.
In the standard system, SAP delivers two exit numbers with the respective function modules:
Naming convention: the first character of the exit number may only be 'G' (SAP) or 'Z' (customer). The remaining characters are taken from the range '0123456789'.