Well, I checked your chart test.xls file. Since your file contains Area, XY(Scatter) and Surface charts which are not completely supported for xls2pdf converion. We will support them soon enhancing xls2pdf conversion. Currently, Column, Bar, Line and Pie charts with 2-D are completely supported.
Could you please make sure that if a particular chart type is not supported then ignore that in the output document instead of throwing an error so if I have two charts in the same document and one is supported then I should see one chart in the output document.
Now there is no error. Thats Great!! but still there is some issue. Only first two charts match in the input and output document and rest of the charts are different in PDF than in xls file. Is it possible to ignore conversion instead of some different chart.
Since your third, fourth and sixth charts are 3-D Area, 3-D Pie and 3-D Surface respectively. Currently we don't support the 3-D charts as we are working on it and it will be available soon. For complete list of supported charts please check: Converting Chart to Image
if a chart is not supported, it will get a column / bar like shape in the output file.