Hi Skip, Skip Montanaro writes:

I occasionally get tracebacks like

No input for required field .... File /home/dolphin/skip/src/Zope/lib/python/ZPublisher/HTTPRequest.py, line 445, in processInputs File /home/dolphin/skip/src/Zope/lib/python/ZPublisher/Converters.py, line 115, in field2required ValueError: (see above)

The ValueError is being raised in field2required, but I see no parameters in the Apache log with a name of "...:required". That leads me to suspect that somehow the RESPONSE parameter isn't getting set (it's the only non-defaulted parameter in the suspect published methods that doesn't appear to have its value set directly by parameters in the URL).

I suspect the problem comes from a "POST" operation. You will not see POST operation parameters in the web server log files. It is highly unlikely that a missing RESPONSE causes the problem. Such an error would be handled at a different place (I think in "mapply"). At line 444 of "ZPublisher/HTTPRequest.py", you will see the following code: if flags&CONVERTED: try: item=converter(item) except: if (not item and not (flags&DEFAULT) and defaults.has_key(key)): item = defaults[key] if flags&RECORD: item=getattr(item,attr) if flags&RECORDS: item.reverse() item = item[0] item=getattr(item,attr) else: raise Add "print key; sys.stdout.flush()" before the final "raise". This will print the corresponding "key" (with is missing). To get more information: the variable "fslist" contains all parameters. It is a list of objects. Each object has a "name" attribute (which gives the form variable name or 'key'), the object either has a "file" or "value" attribute. You may look at line 370, to see how it is processed. You can test your debugging code in your test environment. Simply create a form with a "xxx:required" variable name and do not provide a value. Dieter