I am trying to make a line chart, but Google Charts keeps throwing this error when I try to add a row of data:

Error: Every row given must be either null or an array. @ ...corechart.I.js:162

Here are some example columns I tried. Making the columns works fine, and displays an empty graph as long as I don't add any rows.

var data = new google.visualization.DataTable();

        data.addColumn('number', 'timestamp');

        data.addColumn('number', 'JPY');

        data.addColumn('number', 'EUR');

        data.addColumn('number', 'SEK');

        data.addColumn('number', 'HKD');

        data.addColumn('number', 'CHF');

//So far so good

Now, no matter how I try to pass an array with addRows(), I get the error. I have found similar questions here, but they've all failed for reasons of malformed code or used a different methodology to pass the code in. So here is a simplified test case, which still fails.

data.addRows([1,2,3,4,5,6]); //Breaks the chart

I also tried:

var myrow = new Array(1,2,3,4,5,6);

data.addRows(myrow);

I don't see how I can make this any more literally an array. I also passed two at once, because all the example code seems to pass multiple rows.

data.addRows([1,2,3,4,5,6],

             [7,8,9,10,11,12]);

Still fails.