while loading data from excel to mrvs, it is not updating the mrvs.

[sri8]

(function executeRule(current, previous /*null when async*/ ) {

    //Check for attachment - Query the sys_attachment table to see if current.sys_id has an attachment there

    var tableAssociateAttachment = 'xyzsc_req_item';

    //Check for attachment - Query the sys_attachment table to see if current.sys_id has an attachment there

    var attach = new GlideRecord('sys_attachment');

    attach.addQuery('table_name', tableAssociateAttachment);

    attach.addQuery('table_sys_id', current.sys_id);

    attach.query();

    if (attach.next()) {

        gs.log("Found attachment for record: " + attach.file_name);

        attach.table_name = 'sc_req_item';

        attach.update();

        try {

            processImportDatatoMRVS(current);

        } catch (e) {

            gs.addErrorMessage('Error. Cannot import data to MRVS');

        }

    } else {

        gs.log("No attachment found, throwing error");

    }

})(current, previous);

function processImportDatatoMRVS(current) {

    var dataSourceTable = 'sys_data_source';

    var importSetTableName = 'data_to_mrvs'; // import set table name

    // Create data source from attachment - A data source is how ServiceNow imports data into an Import Set

    var dataSource = new GlideRecord(dataSourceTable);

    dataSource.name = "add_" + current.sys_id; //

    dataSource.type = "File";

    dataSource.format = "Excel";

    dataSource.file_retrieval_method = "Attachment";

    dataSource.import_set_table_name = importSetTableName;

    dataSource.header_row = 1;

    dataSource.sheet_number = 1;

    var dataSourceId = dataSource.insert();

    gs.log("Data source created: " + dataSourceId);

    //- Copy attachment to data source - A data source with an excel attachment type expects an excel attachment to import from

    gs.log("Copying attachment from current table: " + current.getTableName() + "." + current.sys_id + " to data source");

    new GlideSysAttachment().copy(current.getTableName(), current.sys_id, dataSourceTable, dataSourceId);

    gs.log("Done copying attachment, data source is now setup");

    //Create import set from data source - Read the spreadsheet and insert the rows into an import set

    gs.log("Importing data from data source into import set");

    var loader = new GlideImportSetLoader();

    var importSetRec = loader.getImportSetGr(dataSource);

    var ranload = loader.loadImportSetTable(importSetRec, dataSource);

    importSetRec.state = "loaded";

    importSetRec.update();

    gs.log("Loaded records into import set number: " + importSetRec.number + " and sys id " + importSetRec.sys_id);

    //- Read import set table - We do not use a transform for this, rather we read the import set and build our data while looping over the rows

    gs.log("Getting rows from import set we just loaded - creating array of rows for MVRS");

    var mvrsArray = [];

    var importSetRow = new GlideRecord(importSetTableName);

    importSetRow.addQuery("sys_import_set", importSetRec.sys_id);

    importSetRow.query();

    while (importSetRow.next()) {

        gs.log("Got row from import set, creating object for MVRS row and adding it to MVRS array");

        var mvrsValue = {

            name: importSetRow.u_host_name.getValue(), //name

            ip_address: importSetRow.u_addci_ipaddress.getValue(), //ip_address

environment:importSetRow.u_addci_environment.getValue()

        };

        mvrsArray.push(mvrsValue);

    }

    //- Create MVRS data array - MVRS records are stored as an array of Javascript objects - each object is a row and the array is the table. Therefore, we generate an array of objects and JSON.stringify it to set the MVRS data on the SC item.

  //  gs.log("Got all rows, now setting the MVRS variable value on the SC item");

    current.variables.mrvs_name = JSON.stringify(mvrsArray);

    //Once that's done, we have our spreadsheet data imported into our record.

}

we are getting null values.. 

can anyone suggest..

thanks