Need 'Reported by' field to get populated in Notification while trying to create a Work Order

Hi All,

In SAP system, a configuration was done because of which the 'Reported by' field in Notification got mandatory. Now, while I am trying to create a Work Order in IW31, a information message pops up saying Field 'Reported by' must be filled. Refer below screenshot: 

After receiving the message I went to Notification then and there to provide 'Reported by' field. Refer below screenshot:

After providing Reported by field, I went back to IW31 screen and was able to save and create the Work Order. Now I have to achieve the above functionality through ABAP. I checked BAPI_ALM_ORDER_MAINTAIN but could not find a solution.

Please help on how to populate Reported by field programmatically.

Thanks

Manish Verma