Field help (ANMTYP) 

A counter always produces alphanumeric keys. But if the type declared here is numeric, the header zeros are deleted when the value is returned. Thus, a counter which has been declared numeric with 6 numbers will commence with the value "1", whilst an alphanumeric counter with 6 characters starts with the value "000001". Warning, if the counter is defined as numeric and alphanumeric components are declared in the counter structure, no control will be carried out at the creation, but at utilization with only the numeric part of the counter header will be returned.