Sounds like the id field has been left blank. Chui Tey ------------------------- Hello, I've been trying to succesfully use ZGDChart, I'm using Zope 2.1.6 and python 1.5.2. I've added an SQL method the when I try to add an ZGDchart I get the following error: "No input for required field" from source: <!-- Traceback (innermost last): File /home/pibleck/Zope-2.1.6-src/lib/python/ZPublisher/Publish.py, line 214, in publish_module File /home/pibleck/Zope-2.1.6-src/lib/python/ZPublisher/Publish.py, line 179, in publish File /home/pibleck/Zope-2.1.6-src/lib/python/Zope/__init__.py, line 202, in zpublisher_exception_hook (Object: ApplicationDefaultPermissions) File /home/pibleck/Zope-2.1.6-src/lib/python/ZPublisher/Publish.py, line 126, in publish File /home/pibleck/Zope-2.1.6-src/lib/python/ZPublisher/HTTPRequest.py, line 392, in processInputs File /home/pibleck/Zope-2.1.6-src/lib/python/ZPublisher/Converters.py, line 115, in field2required ValueError: (see above)