Work order operation API is not working

We have to update work order operation status. So we were trying to update by the below query.

DECLARE

  g_eam_op_tbl10 EAM_PROCESS_WO_PUB.eam_op_tbl_type;

  g_eam_op_comp_tbl0 EAM_PROCESS_WO_PUB.eam_op_comp_tbl_type;

  g_eam_op_network_tbl0 EAM_PROCESS_WO_PUB.eam_op_network_tbl_type;

  g_eam_res_tbl0 EAM_PROCESS_WO_PUB.eam_res_tbl_type;

  g_eam_res_inst_tbl0 EAM_PROCESS_WO_PUB.eam_res_inst_tbl_type;

  g_eam_sub_res_tbl0 EAM_PROCESS_WO_PUB.eam_sub_res_tbl_type;

  g_eam_res_usage_tbl0 EAM_PROCESS_WO_PUB.eam_res_usage_tbl_type;