Conversion fails if json object has field with name "length"

[richwhitjr]

If a json object has a field with name length the internal code seems to set the value to some internal length attribute and you get an error of " the R00tJsonObject class is exceding 22 fields, generated but it will not work, due to the Product arity limitation"

You can recreate this issue by putting the following json object into the website {"length":100}.