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Invalid XML

I am evaluating your product and cannot get my first grid to work. Javascript is:

mygrid = new dhtmlXGridObject('gridbox');
alert('Running Script');
mygrid.imgURL = "images/";
mygrid.setHeader("Property,C1_C4,#cspan,C5S,#cspan");
mygrid.attachHeader("#rspan,Input,Calc.,Input,Calc.");
mygrid.setInitWidths("200,100,100,100,100");
mygrid.setColAlign("left,right,right,right,right");
mygrid.setColTypes("ro,ro,ro,ro,ro");
mygrid.setColSorting("str,int,int,int,int");
mygrid.init();
mygrid.loadXML("griddata/grid.xml");

and the XML is:

<?xml version="1.0" encoding="iso-8859-1"?>
<rows>
<row id="1">
<cell>Cut Type</cell>
<cell>Contiguous</cell>
<cell>Contiguous</cell>
<cell>Contiguous</cell>
<cell>Contiguous</cell>
</row>
<row id="2">
<cell>Cut Status</cell>
<cell>Ready</cell>
<cell>Ready</cell>
<cell>Ready</cell>
<cell>Ready</cell>
</row>
<row id="3">
<cell>Percent weight yield</cell>
<cell>1.15</cell>
<cell>1.14996093971</cell>
<cell>1.09</cell>
<cell>1.08996297764</cell>
</row>
<row id="4">
<cell>Component composition by weight_Methane</cell>
<cell>0.01</cell>
<cell>0.862068965517</cell>
<cell> </cell>
<cell> </cell>
</row>
<row id="5">
<cell>Component composition by weight_Ethane</cell>
<cell>0.02</cell>
<cell>1.72413793103</cell>
<cell> </cell>
<cell> </cell>
</row>
<row id="6">
<cell>Component composition by weight_Propane</cell>
<cell>0.23</cell>
<cell>19.8275862069</cell>
<cell> </cell>
<cell> </cell>
</row>
<row id="7">
<cell>Component composition by weight_Iso butane</cell>
<cell>0.19</cell>
<cell>16.3793103448</cell>
<cell> </cell>
<cell> </cell>
</row>
<row id="8">
<cell>Component composition by weight_N butane</cell>
<cell>0.71</cell>
<cell>61.2068965517</cell>
<cell> </cell>
<cell> </cell>
</row>
<row id="9">
<cell>Component composition by weight_N pentane</cell>
<cell> </cell>
<cell> </cell>
<cell>1.09</cell>
<cell>100</cell>
</row>
</rows>

On the screen I see the column headings and then the message I get is "Invalid XML" and the table contents don't display.

Any ideas?

Please check attached sample - it uses code and XML from you snippet and it works fine
"Invalid XML" message means that your XML can't be correctly parsed - are you loading it from static XML file or from server side script.
In second case script must set correct content - type ( text/xml ) and no whitespaces before <?xml tag.

Also if you loading data from local filesystem ( not http:// but C:/some... ) there is a limitation for IE , in such mode it able to parse only UTF-8 based XML ( if page loaded by http:// any encoding can be used )

I discovered that the error was that I was using ampersand nbsp; in a cell instead of leaving it blank or just putting in a space.  When posing the question here, your system changed the codes into a space which is why it worked for you.

Thanks for your prompt reply though.

If you need to use & in cell value you can do in one of two next way

quoting
<cell>&amp;nbsp;</cell>

escaping by cdata
<cell><![CDATA[&nbsp;]]></cell>