I’m using OPC UA PubSub 4.5.8.

This version is the latest version provided by you. I also found the following in the release notes:
“Fixed: JSON encoding of Network and DataSet Messages is now following the defined JsonNetworkMessageContentMask and DataSetFieldContentMask.”
but i think it’s not fixed.

It is intended to display the StatusCode using a DataSetFieldContentMask.
——————————————————————————————————
// DataSetFieldContentMask defines if we want to include meta information like StatusCode or
// SourceTimestamp for the published variables.
DataSetFieldContentMask fieldContentMask = DataSetFieldContentMask.of(
DataSetFieldContentMask.StatusCode,
DataSetFieldContentMask.SourceTimestamp,
DataSetFieldContentMask.ServerTimestamp);
variableDataSetWriterConf.setFieldContentMask(fieldContentMask);
———————————————————————————————————-

but StatusCode is still not displayed.
———————————————————————————————————-
{
“MessageId”: “bf009c78-61fe-4a33-8d0d-65d183ad5a68”,
“MessageType”: “ua-data”,
“PublisherId”: “default-publisher”,
“Messages”: [
{
“DataSetWriterId”: “0”,
“Payload”: {}
},
{
“DataSetWriterId”: “0”,
“Timestamp”: “2021-09-05T21:00:57+0900”,
“Payload”: {
“LIPS_03_TRIO_trio_event_and_rollover_clear”: {
“Value”: false,
“SourceTimestamp”: “2021-09-05T21:00:55+0900”
},
“LIPS_03_TRIO_trio_do1_on_select”: {
“Value”: false,
“SourceTimestamp”: “2021-09-05T21:00:55+0900”
},
“LIPS_03_TRIO_trio_do1_on_op”: {
“Value”: false,
“SourceTimestamp”: “2021-09-05T21:00:55+0900”
},
“LIPS_03_TRIO_trio_do1_off_select”: {
“Value”: false,
“SourceTimestamp”: “2021-09-05T21:00:55+0900”
},
“LIPS_03_TRIO_trio_do1_off_op”: {
“Value”: false,
“SourceTimestamp”: “2021-09-05T21:00:55+0900”
},
“LIPS_03_TRIO_trio_do2_on_select”: {
“Value”: true,
“SourceTimestamp”: “2021-09-05T21:00:55+0900”
},
…
———————————————————————————————————-

If I’m using it wrong, I’d like to know when to use DataSetFieldContentMask.