Field help (ANMTYP) 

A counter always produces alphanumeric keys. If you define the Type as Numeric the leading zeros are deleted when the value is returned. A counter that has been declared as numeric with 6 numbers will therefore start with the value "1", whilst an alphanumeric counter with 6 characters will start with the value "000001".

If the counter is defined as numeric and alphanumeric components are declared in the structure of the counter, no control will be carried out at the creation. When utilized, only the numeric part of the counter will be returned.