<Gregor: mailed you directly coz you saved my bacon on something very related last time :-)> Is there an easy way to create a fileupload instance from a string? I am trying to batch convert a load of ExtImage files to give them all different sized preview images, but manage_addExtImage() doesn't accept a string. Alternatively, if anyone has a better way to achieve what I want, I'm very much open to suggestions. Here's the script I've got. ---- for old_folder in container.photos.objectValues(['Folder']): container.manage_addFolder(old_folder.getId()) new_folder = container[old_folder.getId()] for extimage in old_folder.objectValues(['ExtImage']): new_folder.manage_addProduct['ExtFile'].manage_addExtImage(id=extimage.getId (), title=extimage.title, file=extimage.index_html(), create_prev=1, maxx=400, maxy=400, ratio=1) ---- Running it gives me: Error Type: TypeError Error Value: open, argument 1: expected string without null bytes, string found <see traceback below> Traceback (innermost last): File C:\PROGRA~1\zope233\lib\python\ZPublisher\Publish.py, line 223, in publish_module File C:\PROGRA~1\zope233\lib\python\ZPublisher\Publish.py, line 187, in publish File C:\PROGRA~1\zope233\lib\python\Zope\__init__.py, line 221, in zpublisher_exception_hook (Object: Traversable) File C:\PROGRA~1\zope233\lib\python\ZPublisher\Publish.py, line 171, in publish File C:\PROGRA~1\zope233\lib\python\ZPublisher\mapply.py, line 160, in mapply (Object: resizer) File C:\PROGRA~1\zope233\lib\python\ZPublisher\Publish.py, line 112, in call_object (Object: resizer) File C:\PROGRA~1\zope233\lib\python\Shared\DC\Scripts\Bindings.py, line 324, in __call__ (Object: resizer) File C:\PROGRA~1\zope233\lib\python\Shared\DC\Scripts\Bindings.py, line 354, in _bindAndExec (Object: resizer) File C:\PROGRA~1\zope233\lib\python\Products\PythonScripts\PythonScript.py, line 336, in _exec (Object: resizer) (Info: ({'script': <PythonScript instance at 014B3F20>, 'context': <BTreeFolder instance at 0CC01490>, 'container': <BTreeFolder instance at 0CC01490>, 'traverse_subpath': []}, (), {}, None)) File Script (Python), line 6, in resizer (Object: Traversable) File C:\PROGRA~1\zope233\lib\python\Products\ExtFile\ExtImage.py, line 88, in manage_addExtImage (Object: Traversable) File C:\PROGRA~1\zope233\lib\python\Products\ExtFile\ExtImage.py, line 321, in manage_file_upload (Object: CatalogAware) File C:\PROGRA~1\zope233\lib\python\Products\ExtFile\ExtFile.py, line 371, in manage_file_upload (Object: CatalogAware) File C:\PROGRA~1\zope233\lib\python\Products\ExtFile\ExtFile.py, line 466, in _copy (Object: CatalogAware) TypeError: (see above)