CRM creating multiple category using FM CRMD_ORDER_MAINTAIN

Hi Friends,

I am developing program to create service request with multiple category (1,2,3,4). I am able to create Service request for with one category using FM CRMD_ORDER_MAINTAIN but when I am passing values of second category in the program in same call, it is replacing value of first category.

I have gone through one very helpful blog but unfortunately it also do not show how to update multiple category. (https://scn.sap.com/people/jonathan.groll2/blog/2012/06/25/how-to-set-multi-level-categorization--crm-orders)

Kindly suggest how we can do it.

Thanks,

Brijesh