error when trying to import image in pod

I am still not having luck importing an image using pod. The "note" in my temp.odt file looks like:

do text
from document(at='logo.png')

The Python code I execute is:

from appy.pod.renderer import Renderer
rendered = Renderer('temp.odt', {}, 'res.odt')
rendered.run()

This creates res.odt, but with the following error in the note field:

Error while evaluating the expression "document(at='logo.png')" defined in the "from" part of a statement.
File "<string>", line 1, in <module>
File "c:\python27\lib\site-packages\appy\pod\renderer.py", line 293, in importDocument
res = imp.run()
File "c:\python27\lib\site-packages\appy\pod\doc_importers.py", line 224, in run
width, height = getSize(self.importPath, self.format)
File "c:\python27\lib\site-packages\appy\pod\doc_importers.py", line 190, in getSize
return float(x)/pxToCm, float(y)/pxToCm
<type 'exceptions.TypeError'>: float() argument must be a string or a number

It looks like importPath is getting set incorrectly. I am developing on Windows. I do not see a way to attach files to this ticket, but I can send the .odt and .py I am working with if that helps. Thanks!