SAP_WAPI_START_WORKFLOW: ErrorUser has no authorization to start workflow

Hi all,

I am using SAP_WAPI_START_WORKFLOW to trigger workflow from my program.

I am getting following message line Error:User has no authorization to start workflow.

please guide how to/where to change user and also where to verify which id has rights to start workflow.

The workflow is successfully getting executed from SWDD.

Thanks.