Troublshooting uncaught exception: [object Object]

[jjf...@gmail.com]

Hello,
I'm getting "uncaught exception: [object Object]" error while trying to adapt jsfiddle code http://jsfiddle.net/jjfrick/wDwme/ to my app.
How can I go about troubleshooting this can of error?
I changed:

    employees: ko.observableArray([
        new employee(201, "Gerald", "574-234-1234", 101),
        new employee(202, "Andy", "574-234-2345", 102),
        new employee(203, "Ed", "574-234-3456", 102),
        new employee(204, "Bill", "574-234-4567", 103),
        new employee(205, "Frank", "574-234-5678", 103),
        new employee(206, "Chris", "574-234-6789", 104),
        new employee(207, "Dave", "574-234-7891", 104),
    ]),

to...

        loadEmployees: function () {
            OData.read(_serviceURL + "/HRdata?$filter=Status eq 'A' and length(HomeDeptCode) eq 6&$orderby=LastName",
            function (data) {
                viewModel.employees.removeAll();
                $.each(data.results, function (index, item) {
                    viewModel.employees.push(ko.mapping.fromJS(item));
                });
            });
        },

the above code alone does not result in an error, but when I change:
ko.applyBindings(viewModel);
to
ko.applyBindings(viewModel);
viewModel.loadEmployees();
I get the error.
Thansk, Jeff

[parwej ahamad]

Can you suggest us on which line you are getting error? 

Are you sure data object is populating through the service?

Return data is having the same format as you are binding?

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[Ryan Rahlf]

JJ, this is certainly an issue inside your "loadEmployees" function.  

Does OData exist?  Does _serviceURL exist?  Is it accessible?  Is the ko.mapping script included and ko.mapping exists?  These are the things you'll need to verify before you look into knockout issues.  You may be able to get some of these working in your fiddle using external resources, but it's probably quicker to add a few quick checks in your loadEmployees function in your development code.

-Ryan Rahlf

____________________

http://RyanRahlf.com

@Ryanthem