[web2py] pyFPDF error

[lyn2py]

I ran into an error:

Traceback (most recent call last):
  File "/Users/xxx/web2py/source/gluon/restricted.py", line 209, in restricted
    exec ccode in environment
  File 
"/Users/xxx/web2py/source/applications/solidworks/controllers/default.py" 
<http://127.0.0.1:8000/admin/edit/solidworks/controllers/default.py>, line 442, 
in <module>
  File "/Users/xxx/web2py/source/gluon/globals.py", line 185, in <lambda>
    self._caller = lambda f: f()
  File 
"/Users/xxx/web2py/source/applications/solidworks/controllers/default.py" 
<http://127.0.0.1:8000/admin/edit/solidworks/controllers/default.py>, line 345, 
in pdft
    return f.render('invoice.pdf', dest='S')
  File "/Users/xxx/web2py/source/gluon/contrib/fpdf/template.py", line 114, in 
render
    element = element.copy()
AttributeError: 'Row' object has no attribute 'copy'


Help please?

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