Your internal table has header line.
In FM call, try passing ITAB_SOURCE[] instead of ITAB_SOURCE.
And ITAB_DATASOURCE_MODE[] instead of ITAB_DATASOURCE_MODE.
Your internal table has header line.
In FM call, try passing ITAB_SOURCE[] instead of ITAB_SOURCE.
And ITAB_DATASOURCE_MODE[] instead of ITAB_DATASOURCE_MODE.