Hi
Thanks for your inquiry. Please make sure that the image exists on the following path. Maybe you should use full path instead of relative.
I use the following code for testing:
// Create document and DocumentBuidler object
Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);
// Insert HTML.
string html =
@"<table>
<tr>
<td>
<img src='C:\Temp\img.jpg' />
</td>
</tr>
</table>";
builder.InsertHtml(html);
doc.Save(@"C:\Temp\out.doc");