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Content is invalid 'null'

Jun 1, 2012 at 12:05 AM

has anyone experienced OpenCalais returning an error with the message content is invalid: 'null'? According to the Calais documentation this is caused when the input content string is either empty or null, but I've set the content string and I know it's definitely not null or empty.

This doesn't happen all of the time, but in passig web pages to Calais it happens maybe 70% of the time.

I can see that Calais itself can process the information in the content if I manually submit the request with the same data, so I know it's not the Calais service itself.

Any insight into what's going on would be extremely appreciated - it's a very useful library and makes Calais extremely accessible, but with these problems the data loss rate is unfortunately unacceptable.

Thanks for any help that can be offered.