jQWidgets Forums

My jqGrid fetch data from remote conntoler.
I did it conustuct like

var sourceGridInternih = {
    dataFields: [{
        name: 'id',
        type: 'int'
    },
        {
            name: 'sklId',
            type: 'int'
        },
        {
            name: 'vsklId',
            type: 'int'
        },{
            name: 'skl',
        type: 'string'
    }, {
            name: 'vskl',
        type: 'string'
    }, {
        name: 'datum',
        type: 'date'
    }, {
            name: 'datumDo',
            type: 'date'
    }, {
            name: 'broj',
        type: 'string'
    }, {
            name: 'status',
        type: 'string'
    }, {
            name: 'statuscode',
        type: 'string'
    }, {
            name: 'tag',
        type: 'string'
    }, {
            name: 'napomena',
            type: 'string'
    }, {
            name: 'izradio',
            type: 'string'
    }
    ],
    id: 'id',
    async: false,
    type: 'POST',
    dataType: 'json',
    url: '../../InterneNarudzbe/GridDokumenata',
    cache: false,
    formatData: function (data) {
        return {
            odDatuma: $("#odDatuma").val(),
            doDatuma: $("#doDatuma").val(),
            sklFilter: $("#filterSklIsporuci").val(),
            vsklFilter: $("#filterSklNarucici").val(),
            filterStatus: $("#filterStatus").val(),
            filterTag: $("#filterTag").val(),
            grupaRjFilter: $("#grupaRjFilter").val()
        };
    },
    data: {}
};
var adapterGridInternih = new $.jqx.dataAdapter(sourceGridInternih, {
    formatData: function (data) {
        //data.tabelaId = tabelaId
        return data;
    }

});

$(document).ready(function () {
$("#gridInternih").jqxGrid({
        source: adapterGridInternih
    });
});

This works perfectly,
In other places in code I do refres by

$('#gridInternih').jqxGrid('updatebounddata', 'data');

Sometimes controller fail to response data to ajax call.
In that cases grid refreshes without rows.
And user get message There is no tow for display

In chrome console I do get error
POST http://localhost:60208/InterneNarudzbe/GridDokumenata net::ERR_CONNECTION_REFUSED
But end users does not hold console open.

I want to subscribe to this error so I can printout user error to explain him that tere was error.